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GSO 2" Crayford Focuser for Reflectors - Dual Speed

4.6 (48 Reviews) Read Reviews Write Review
Brand GSO
Part Number -
Availability available

Product Info

Manufacturer Description

This very high quality, dual-speed Crayford focuser for reflector telescopes from Guan Sheng Optical (GSO) is a joy to use. You will wonder how you ever lived without it once you install it! It will make achieving precise focus for visual observations and astrophotography a breeze and you will experience very smooth and precisely controlled focuser motion with zero backlash and zero image shift.

CNC machined from aluminum and anodized black with a chrome-plated inner barrel, this focuser comes with a base plate to attach to your reflector telescope. The inner drawtube glides on 4 precision bearings and a roller shaft and provides 40mm of focus travel. The inner barrel is baffled and painted a flat black to minimize reflections for maximum contrast.

The 2" focuser barrel features a brass compression ring so your eyepieces and other accessories will not be marred by the set-screw. Also included is a 1.25"-2" adapter with brass compression rings that is threaded to accept standard 2" filters.

The focuser also has two large thumbscrews. The thumbscrew on the telescope side can be used to lock the focuser, allowing the use of heavy accessories or cameras without fear or slippage or losing focus. The other thumbscrew on the eyepiece end can be used to adjust the tension of the focuser to achieve a focusing "feel" that you like. At the easiest (lightest) setting, the focuser moves extremely smoothly. At tighter settings, you can still use heavier accessories without sacrificing much of the smooth focuser action. GSO's rated load capacity for their Crayford focusers is a little less than 6 lbs (2.7 kgs).

Focuser Specifications (With Curved Base Plate):
• Minimum focuser height (with 1.25" adapter) = 3.27" (83mm)
• Maximum focuser height (with 1.25" adapter) = 4.84" (123mm)
• Minimum focuser height (without 1.25" adapter) = 2.87" (73mm)
• Maximum focuser height (without 1.25" adapter) = 4.45" (113mm)
• Tube travel = 1.57" (40mm)
• Drawtube outer diameter (cut-out in your telescope tube must exceed this) = 2.29" (58.1mm)
• Focuser weight (with 1.25" adapter) = 1lb-10.5oz (751gm)
• Focus knob diameter = 1.57" (40mm)
• Microfocuser knob diameter = 1.02" (26mm)
• Microfocuser reduction ratio = 1:10
• Maximum outer body diameter = 3.15" (80mm)
• Millimeter markings on focuser drawtube: No
• Rotatable: No (But body can be rotated by loosening two allen screws that connect the focuser to the base plate)
• Dust plug: One 1.25" dust plug included

Please note: Most GSO Crayford focusers have or will soon develop two bearing marks/lines on the upper side of the drawtube. This is caused by wear on the barrel anodizing where is makes contact with the roller bearings. In some focusers, you have to look hard to find these marks. In others, it is very prominent, even for brand new items received from GSO. This does not indicate a defective or used product and is essentially just cosmetic.

Reviews

4.6 (Based on 48 Reviews) 98% of reviewers recommended this product.
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    1. timothy1776

      timothy1776 New Member

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      Review by Timothy B.
      1560404030
      Jun 12, 2019

      5.0 Very Nice

      Pros:

      Cons:

      Comments:

      Very nice focuser.. fit perfectly on a 12" Meade Light Bridge. No modifications needed to be made. I installed it in under 5 minutes. 303mm base plate was a direct fit.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Michael D.
      1559142513
      May 29, 2019

      4.0 part was what was advertised.

      Pros:

      Cons:

      Comments:

      part was what was advertised. It works and does what I want it to.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Paul G.
      1556247482
      Apr 25, 2019

      5.0 Great product

      Pros:

      Cons:

      Comments:

      This is a nice focused for the money.
      Very smooth running.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Bobby F.
      1556041342
      Apr 23, 2019

      5.0 Awsome forcuser

      Pros:

      Cons:

      Comments:

      This focuser is well made and very smooth. Unfortunately, none of the base plates will cover the original hole on the Celestron C10.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by Thomas N.
      1551197012
      Feb 26, 2019

      5.0 Nice 2" Crayford Focuser

      Pros:

      Cons:

      Comments:

      Very nice smooth movement. Well made solid focuser that's not to heavy. Reasonably priced for the quality.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by DOUGLAS S.
      1550891668
      Feb 22, 2019

      5.0 Low profile focuser

      Pros:

      Cons:

      Comments:

      Haven’t had a chance to really use it yet, and I will need an extension tube, but Inam excited about the smoothness at which it operates.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by M G.
      1534386778
      Aug 15, 2018

      5.0 Best upgrade for my 200mm

      Pros:

      Cons:

      Comments:

      Best upgrade for my 200mm Klevtsov!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by JAMES H.
      1533179668
      Aug 1, 2018

      5.0 2 INCH FOCUSER

      Pros:

      Cons:

      Comments:

      SOLID CONSTRUCTION, SMOOTH OPERATION AND REQUIRED ONLY SLIGHT MODIFICATION TO TELESCOPE TUBE.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by roger s.
      1528677142
      Jun 10, 2018

      5.0 I haven't used it that

      Pros:

      Cons:

      Comments:

      I haven't used it that much, I'm still trying to work out the kinks in my homemade dob mount.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Stephen V.
      1527514797
      May 28, 2018

      5.0 Very smooth

      Pros:

      Cons:

      Comments:

      Very nice focuser. Installs well. Smooth mechanism. Seems solid and well built

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Gerard S.
      1502235012
      Aug 8, 2017

      5.0 Excellent piece of machinery. I

      Pros:

      Cons:

      Comments:

      Excellent piece of machinery. I am very pleased.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Donald W.
      1501536679
      Jul 31, 2017

      4.0 GSO focuser for a reflector

      Pros:

      Cons:

      Comments:

      I bought the focuser to replace the rack& pinion unit in my 130 mm reflector. It was a drop in for my SkyWatcher reflector. I had to drill new holes and of course align the focuser prior to drilling but other than that it was simple. The GSO focuser is rough compared to more expensive models but the difference in my reflector was a 100 percent improvement!

      Bottom Line: Would you recommend this item? Yes
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      This review was provided courtesy of AgenaAstro.com

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      Review by Kevin W.
      1499349269
      Jul 6, 2017

      5.0 A really nice focuser makes a difference

      Pros:

      Cons:

      Comments:

      I replaced my Astroview 6 EQ 1.25" focuser with this GSO 2" Crayford Focuser in hopes of stabilizing "jitter" when focusing on highly magnified images. The first thing I noticed was how easier it was to obtain sharp focus with the GSO. The GSO smooth micro adjustment will be a perfect match for a remote focuser motor to fully address the jitter issue.

      It was a little unnerving cutting out a larger hole in my telescope to receive the 2" GSO but it was not difficult, and was well worth a little stress. The 176mm base I purchased with the GSO makes a very nice (but not perfect) fit on the 6" OTA. Only someone looking closely would notice it does not exactly match the contour of the OTA. Certainly operation is in no way compromised.

      The GSO provides very smooth operation for the slightest of micro focus tweaks. It feels and looks like a high quality focuser. I will purchase another GSO for my next telescope if it is in need of an affordable, quality focuser that performs very well.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    14. Guest

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      Review by xrayvizhen of Randolph, NJ.
      1478390400
      Nov 5, 2016

      3.0 Good Deal

      Pros:

      Lightweight,Accurate

      Cons:

      Finicky

      Comments:

      I've had this particular focuser for a year now on my homemade 12 1/2" Dobsonian and have put it through it's paces extensively. While I've not used any of the "premium" focusers on the market like Moonlight or Feathertouch to compare its operation with I would have to say, for the price paid, it's a pretty good deal, easily more than an $100 less than a Moonlight, for example. This focuser is solidly constructed and comes with the appropriate tube adapter, which in my case was 14", for no additional cost. The course and fine adjustments work very well, a big positive, BUT... you need to be very precise with the tension adjustment knobs to get it right and considering there are no instructions included, either for installation or usage, knowing which knob does what is a matter of trial and error. Here's the big negative I've found: If you have a lightweight eyepiece in and then replace it with a heavier one, more than likely the drawtube will collapse...pretty frustrating when it happens to you the first time in the dark. You can increase the tension to prevent this but if you do that it makes it more difficult, if not impossible, to focus. Again, since I don't have anything to compare it with I don't know if this is a design flaw inherent with Crayford focusers in general or if this problem is exclusive to this particular one. Since it's so sensitive to weight changes, I would have to also say that if you plan to attach any sort of astrophotography gear to it, you would be wiser to spend extra for a premium focuser. For casual visual observing, which is what I do, this is a nice economical focuser to use.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    15. Guest

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      Review by Dwain of Colorado.
      1477785600
      Oct 29, 2016

      5.0 Well worth the money and makes fine focusing a breeze

      Pros:

      Strong Construction,Easy to Use,Tight tolerances where its important

      Cons:

      Comments:

      I installed this on my 10 year old Orion XT8 that came with an old 1.25" R&P. The focuser drawtube hole in my telescope is 2.37 inches, not the 3.7 inch hole found on the newer style Orion models. No modification was required to the OTA other than 4 new mounting holes. I removed the GSO focuser from the base using the 2 small allen head fasteners to use the base as a template to mark holes. After marking and drilling the holes, it was mounted with no problems at all. Assuming the person installing it has some technical know how, it is very straight forward. Things I like 1. The price. 2. The focus tube tolerances are tight and the focuser has no detectable image shift 3. The baseplate tolerances are perfect to the focuser body keeping it square to the OTA 4. The micro focus is extremely smooth, precise and very easy to use 5. The 2" to 1.25 adapter is a quality piece 6. Different base plate options Things I dislike 1. The 1.6 inches of travel could be better and would really benefit from another .5 inches of travel. This information was readily available on the site and i am not holding it against the product. This is just something that could be improved. The linear bearing version also give more travel but it also requires a slightly larger focus tube hole. I should note I didn't have any issues with my existing eyepieces 2. The lock tensioner thumb screw is pretty loose and can vibrate out while driving to a viewing location. I was able to resolve this by putting some teflon tape around the threads of the thumb screw. It didnt take much, maybe 2 or 3 wraps. 3. No mounting hardware or instructions included 4. Base mount holes are not angled so the nuts do not sit flat inside the OTA, This could be remedied by increasing the hole size in the back of the base. to allow for angled install. I plan on trying this soon. I would give this a 4.5 out of 5 but since i cant do half stars, it is getting round up to a 5.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    16. Guest

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      Review by GI-Joel of Hemet, California.
      1463702400
      May 19, 2016

      5.0 Gave New Life to an old telescope

      Pros:

      Strong Construction,Awesome Craftsmanship,Accurate,Easy to Use

      Cons:

      Short Barrel

      Comments:

      I have a 10 years old Celestron Omni XLT 150 Newtonianwith CG-4 mount that I have not used for a while, because of focusing issue. Having the original rack and pinion that came with the telescope it is so difficult to colimate. As a result the image is blurry and aberrations every where. I was so frustrated that I was thinking of getting rid of it. A couple o f months ago I have got a 80mm Meade Doublet from Salvation Army store for $7.50 and that scope was a lot better than this Newt, I also got me a new Explore Scientific doublet achromatic last month since the 80mm has spark my astronomy passion again. I was looking only for new eyepiece which led me to Agena Astro store and got me a 8mm Baader Hyperion. While looking for the eyepiece I stumbled upon the focuser section and this item. I contacted Agena and have ask to see if it will fit my old Celestron XLT 150. The only info they can give me are what was written on the website which is a lot of info although it does not tell me anything about my scope. So for my eagerness to upgrade my scope I decided to buy it last Wednesday. I am pretty good at doing mods on things and have accumulated tools to used for modifying things. So 2 days later which I applaud the people from Agena for shipping the item for free and so quickly as it arrive today Friday. As soon as I got the focuser, I went and started dismantling my scope, of course the item does not fit due to the hole size on my scope barrel which is design for 1.25 eyepiece. What I did was I took off the base which fit nicely and accurately to the diameter of the barrel put a painters tape around the focusers opening on my scope and measure the holes for the screw. After I got the base center, I the drill the 4 holes for the screw and loosely fasten the base to my scope. I then traced the focuser's barrel opening from the base and used that for measuring of how much I have to cut on the barrel of my scope. I used a dremmel with a cut-off diamond saw to cut through the traced I have made which is roughly 30mm radius from the center of the foccusers hole. I cleaned the hole with sander attach to my rotary tool and a bur to make fine adjustment to the hole. I took me 2 hours all in all to finish the project. I took it out tonight after colimating the primary and secondary mirror, which only took me a couple of minutes to colimate. Got it set up on my backyard and started slewing towards Jupiter and all can tell everyone is "WOW" I have never thought that my old Newt was this good. I used the 8mm Baader Hyperion eyepiece and the set up matches perfectly. The only Con I can say about this focuser is I wish it would have come with the extension with the barrel being so short, you have to have an extension and make sure to measure your old focuser's travel and focus area so that you will know what size of extension you need to purchase. Lastly I want to thank the people of Agena Astro for the prompt reply and shipping of the item. You guys are awesome. Thank you Tom for the info you have provided me which helped me a lot on this mods. Clear Sky everyone.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    17. Guest

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      Review by Dave C. of Missouri.
      1463443200
      May 16, 2016

      4.0 Excellent upgrade from a stock focuser

      Pros:

      Strong Construction

      Cons:

      Comments:

      Bought to upgrade my Celestron C10'S stock focuser. After some enginuity in building a base to fit the focuser to the optical tube(had no intentions of drilling new holes), has turned a great scope into an even better scope. Worth every penny and time spent into it.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by DMM of Midland, NC.
      1435536000
      Jun 28, 2015

      5.0 Great focuser

      Pros:

      Easy to Use,Strong Construction,Lightweight

      Cons:

      Comments:

      Can't beat this focuser for the price. The ability to change bases is also a plus if you ever decide to switch the focuser to another scope. Once again, Agena comes through with exactly what I needed!

      Bottom Line: Would you recommend this item? No
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by JJ of South Dakota.
      1435363200
      Jun 26, 2015

      4.0 Worked real fine for my needs

      Pros:

      Easy to Use,Strong Construction

      Cons:

      Comments:

      A very good focuser in it's price range

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    20. AlabamaDon

      AlabamaDon New Member

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      Review by Don of Huntsville, AL.
      1424822400
      Feb 24, 2015

      5.0 Excellent focusser

      Pros:

      Strong Construction,Easy to Use

      Cons:

      Comments:

      Because the range of focus is only about 1.5", to use this with a camera and visually, you should consider an eyepiece extension tube.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Phil of Pottsboro, Texas.
      1424563200
      Feb 21, 2015

      5.0 2" Crayford focuser is a best buy.

      Pros:

      Compact,Easy to Use,Lightweight,Strong Construction,Accurate

      Cons:

      Comments:

      Precision machining, tight tolerances, meticulously finished in black, compression ring eyepiece holders for both 2" and 1/14" size eyepieces or extension tubes.
      Mechanism has enough strength and metal to hold largest and heaviest eyepieces including 2" Explore Scientific 120 degree and Tele Vue Ethos and Panoptic series.
      Mounting plate has curved surface to fit a round tube and is 15/32 thick at the 4 mounting bolt holes.
      All interior surfaces are finished in flat black except for the small crayford pressure drive surfaces which are unfinished Aluminum.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    22. Guest

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      Review by Ed of Pensacola, FL.
      1422662400
      Jan 30, 2015

      5.0 Couldn't be happier

      Pros:

      Strong Construction,Accurate,Perfect Fit

      Cons:

      I Didn't Buy It Sooner

      Comments:

      The Crayford was a perfect fit; drop in replacement for the rack and pinion focuser on my older C8N. Turned a good scope into a great scope. I could not recommend this more highly.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by John J. of South Dakota.
      1408147200
      Aug 15, 2014

      5.0 Excellent focuser for the price

      Pros:

      Strong Construction

      Cons:

      Comments:

      The base plate fit my Meade SN6 perfectly and I also tried it on my Orion 6" F5 and it was a perfect fit. Required re-drilling the mount holes on both scopes and opening up the draw tube holes. Not a big deal for someone with the right tools.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    24. Guest

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      Review by Marcelo - beginner astro addicted of Brasilia, Brazil.
      1401753600
      Jun 2, 2014

      5.0 Good quality for the price

      Pros:

      Easy to Use,Strong Construction

      Cons:

      Comments:

      This is a good quality focuser. Once you figure out which bolt does what, it's easy to use. One of the bottom bolt is the friction, other is the lock.
      It just works.
      In comparision with road bicycle (world I came from), it's not a top-of-the-line Shimano Dura-Ace; it's more like the mid-level Shimano 105, with all the features of the higher Dura-Ace, but without the frills (no carbon fiber or titanium bits). This is not a Feathertouch, but it works just fine.
      It may be not the indicated focuser for the advanced observer/astrophotographer, but for me (casual user) it's more than enough in a excellent cost-benefit.
      It's beautifully machined and has all the features in a high quality package.
      There's no manual included.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by Van Webster of Los Angeles, CA.
      1381622400
      Oct 12, 2013

      4.0 Fits the Bill

      Pros:

      Strong Construction,Precision Fit

      Cons:

      Needs A Mounting Template

      Comments:

      This unit is precision made and works smoothly. I purchased it as a retrofit for a 6" newtonian scope. The supplied adaptor plate fit the radius of the optical tube perfectly. This is a low rise focuser and a 2" extension tube may be required to bring some eyepieces inot focus. A mounting template would be a helpful addtion to the package for a more precise drilling of the required oles and optical aperture.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    26. BigZ

      BigZ New Member

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      Review by Stargeezer of Nottingham, NH.
      1370131200
      Jun 1, 2013

      5.0 A very impressive piece of equipment

      Pros:

      Accurate,Lightweight,Strong Construction

      Cons:

      Comments:

      This beautiful, well-made, but not too heavy focuser was used to replace the very heavy 2", single speed focuser that was on my 1972 vintage 10" Cave Newtonian scope. The slower 10:1 speed is what's needed for critical focusing. The price was also a deciding factor in choosing this item. Very, very pleased!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by BSJ of Grand Isle, VT.
      1369958400
      May 30, 2013

      5.0 Third Crayford

      Pros:

      Easy to Use,Accurate,Strong Construction

      Cons:

      Comments:

      This is my third GSO Crayford. One came on my 10" Dob, I put one on a ST80 refractor and this one went onto a 130mm f5 reflector. Now I can use heavy widefield eyepieces without collimation shift!!! In addition, the GREATLY improved function, over the stock plastic focuser, is now a joy to experience.

      Bottom Line: Would you recommend this item? Yes
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      This review was provided courtesy of AgenaAstro.com

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      Review by AstroBuff of Chattanooga, TN.
      1369872000
      May 29, 2013

      5.0 Incredible Service & Item!!

      Pros:

      Compact,Strong Construction,Accurate,Easy to Use

      Cons:

      None

      Comments:

      This is my first time ordering from Agena! I am very happy with their, speed and service on top of this super quality focuser I just got. Seeing the price I didn't expect much but this unit is of equal quality to the ones on my much more expensive refractors! I will be using Agena for all of my future needs!!

      Bottom Line: Would you recommend this item? Yes
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      This review was provided courtesy of AgenaAstro.com

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      Review by Bill of Cayman Islands.
      1365206400
      Apr 5, 2013

      4.0 Super focuser especially for the price

      Pros:

      Strong Construction,Easy to Use

      Cons:

      Comments:

      The fine tunng reference provided makes a difference. I've machined two previous Crayford focusers which were time consuming to do properly. For the price of the GSO and the time saved it was well worth the price.

      All of my dealings with Agena have been more than satisfactory - highly recommended.

      Bottom Line: Would you recommend this item? Yes
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      This review was provided courtesy of AgenaAstro.com

    30. Guest

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      Review by FreeWheeling Frank of Chicago, IL.
      1354320000
      Nov 30, 2012

      4.0 Nice Dual speed Focuser by GSO

      Pros:

      Easy to Use,Accurate,Strong Construction,Silky Smooth,Lightweight

      Cons:

      No Install Instructions

      Comments:

      I bought this as a replacement for an Old 1.25" focuser & I am sooo glad I did! Works great even in low temps!! This is a precision tool that anyone who wants the Best at a reasonable price should consider. PS: Agena AstroProducts is the BEST! They stand out in
      today's marketplace above the rest!! Thank YOU 1 & all.

      Bottom Line: Would you recommend this item? Yes
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      This review was provided courtesy of AgenaAstro.com

    31. Guest

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      Review by Jyams of Memphis, TN.
      1348444800
      Sep 23, 2012

      5.0 Price, Quality, and Service

      Pros:

      Accurate

      Cons:

      Comments:

      Focuser is high quality. Price is competitive. Great service and fast shipping.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Review by copperneck of Utah, USA.
      1324598400
      Dec 22, 2011

      4.0 Quality on a budget!

      Pros:

      Lightweight,Strong Construction,Easy to Use,Accurate

      Cons:

      Comments:

      Very happy with the performance/price ratio. Good quality focuser that doesn't break the bank.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    33. Guest

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      Review by Stargazer Rick of Snoqualmie, WA.
      1320796800
      Nov 8, 2011

      5.0 High quality focuser, upgraded my Meade!

      Pros:

      Easy to Use,Strong Construction,Accurate

      Cons:

      Comments:

      I have been upgrading my Meade 8 inch Dob Starfinder.
      This means replacing or refinishing everything but the tube, as the telescope was apparently made from the cheapest low quality stuff available.
      After having my primary mirror professionally re-coated by NOVA and replacing the finder with a new 2" GSO finder bought at Agena I decided my focuser needed an upgrade. I found this one here at Agena and made the purchase.
      On removing my old focuser I found it to be a thing made mainly of plastic and very low quality. The new GSO focuser was such a contrast in material and workmanship I had to show my children as a way of comparing good versus poor.
      Installing the new focuser was easy, the base fit perfectly and I only had to drill a few new small holes for the mounting hardware to fit.
      The focuser is a dream to use in comparison to my old plastic 'focuser'. The fine focus capability is absolutely the best choice ever, it really does help bring things into clear view.
      The only thing I've had any trouble with at all is that it stands out from the tube an extra half inch when compared with the original focuser on this telescope. This means it is more difficult to get my DSLR to focus without using any lenses, something I am still working on to find a good work around.
      This GSO dual speed focuser was definitely a great purchase and I'd wholeheartedly recommend it!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    34. Guest

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      Review by Erik G. of Norway.
      1306886400
      May 31, 2011

      4.0 Got a new telescope!

      Pros:

      Accurate

      Cons:

      Comments:

      Bought to upgrade a Meade LXD75 6" Newton. Had to cut the tube to fit. Focuser is excellent, smooth and steady, no image shift. The tub optics has got what it deserves, not the original that was made of plastic . I have got a new telescope.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    35. dbigers

      dbigers New Member

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      Review by Donnie of Western KY.
      1304467200
      May 3, 2011

      5.0 Solid and buttery smooth

      Pros:

      Strong Construction,Accurate,Very smooth

      Cons:

      Comments:

      I bought this to replace the stock focuser on a Meade SN6. I was familiar with the focuser because the Zhumell dob that I briefly owned had one as standard equipment.

      Though this is not a drop in replacement, the installation is very straight forward. Agena now offers the 6" base as an option when ordering. In the past you were limited to the 8-12" bases. Using the 8" base required some shimming to work with a 6" scope.

      That is not a problem now because the 6" base that Agena offers fits the curvature of a 6" scope perfectly. As I said, this is not a drop in replacement. I had to drill new holes for the screws that secure the focuser to the tube. I also had to use a dremel tool to slightly enlarge the opening for the drawtube. Although the stock Meade focuser is a 2" unit, the O.D. of the drawtube on the GSO focuser is a just a few millimeters larger.

      Having said that, installation took 20 minutes at the most, including drilling the holes and enlarging the hole. Again though, the 6" mounting base makes the installation look professional. No gaps at all, just a seamless execution.

      As for the focuser itself, the difference is night and day over the stock rack and pinion that Meade supplies with the scope. The dual speed is very smooth and very handy when imaging. Focuser holds my Canon DSLR with ease and doesn't slip.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    36. Guest

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      Review by KS1U of Quaker Hill, CT.
      1303084800
      Apr 17, 2011

      5.0 You could spend more, But Why?

      Pros:

      Smooth and accurate,Strong Construction,Nicely machined

      Cons:

      Comments:

      If you are building your own reflector from scratch or as in my case, rebuilding and upgrading an older scope, you can't do any better than this. The GSO 2 inch focuser is not just a cheap replacement, it is a precise high quality component ready for use on any reflector and can handle the weight of any 2 inch eyepiece made. Mine carries a binoviewer and optical corrector with two eyepieces just fine. In rebuilding a ca 1980 Gebelein 8 inch f/2.9 relfector I chose this focuser and am glad I did. You could spend more, a lot more, and not get any better performance. If you have an old Criterion, Parks, Coulter etc. and want to broing it up to date with a precise 2 inch focuser, which will not mar your eyepieces with the old captive screws, look no further than this focuser.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    37. Guest

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      Review by Stargazer of Chandler, Arizona.
      1294012800
      Jan 2, 2011

      5.0 Thrilled

      Pros:

      Strong Construction,Bang for the buck,Focusing is easy,A pleasure to use

      Cons:

      Bolt pattern didn't match

      Comments:

      I have an older Orion 12" Dob. The original rack and pinion focuser was so bad, I couldn't accurately collimate the scope. And when observing, finding the best focus was a tiresome chore. The GSO focuser is an absolute pleasure to use. I generally use a bino-viewer and it handles the weight beautifully. I am 100% satisfied.

      Mounting it was a bit of a chore. The mounting hole pattern did not match that of the original focuser and the curve of the base did not match the curve of the Orion's tube. So I used the adapted plate from the old focuser and I drilled new holes. This wasn't a major problem for me, but I expected it to match up. Even though I had to use the old adapter plate and drill new holes, now that it's mounted, I love it and I'm giving 5 stars.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    38. Guest

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      Review by Astronomy Junkie of Kalamazoo, MI.
      1292803200
      Dec 19, 2010

      5.0 Big things come in small packages

      Pros:

      Compact,Easy to use,Gives precise focus,Strong Construction,Accurate

      Cons:

      None

      Comments:

      Extremely valuable for any serious Astrophotographer! Able to achieve exact focus. Won't ever go back to the old focuser! Able to handle any CCD camera, even with the filter wheel. It paid for itself many time over! Truly a great value for the price!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    39. Guest

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      Review by Hitch of Chandler, AZ.
      1284163200
      Sep 10, 2010

      5.0 A Pleasure to Use

      Pros:

      Strong Construction,Accurate

      Cons:

      Strong Construction,Accurate

      Comments:

      This precision focuser is a pleasure to use. I can fine tune the focus at high power with moving or jittering the scope.

      I can now get a better collimation because there isn't any slop in the focuser and the collimation tools fit precisely in the holders. I really like how the brass ring clamp centers the eyepiece.

      I installed the focuser on an Orion 12" dob. The radius of the base plate didn't exactly match my tube, so I used the adapter from my original focuser. I also had to drill new mounting holes. It took a few hours to get it mounted, but it looks good.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    40. Guest

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      Review by smacbride of Castle Rock, CO.
      1266278400
      Feb 15, 2010

      5.0 Great Focuser for the Price

      Pros:

      Strong Construction,Accurate

      Cons:

      Heavy

      Comments:

      I bought this focuser as an upgrade to a home made dobsonian.

      Out of the box this focuser was much larger than I had anticipated. It is also very heavy compared to the typical rack and pinion focuser it was replacing.

      Once I got the telescope put together and the tube balanced correctly for the extra weight, the focuser worked liked a champ.

      Smooth focusing and the dual speed was very useful at higher powers. The brass compression ring is a nice feature as it doesn't mark your expensive eye pieces.

      Overall a very good product for the price.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    41. Guest

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      Review by Nickname of Southern California.
      1250553600
      Aug 17, 2009

      4.0 Great upgrade

      Pros:

      Accurate,Strong Construction

      Cons:

      Comments:

      It fit my 12" Dob with no modifications. it works (insert Carl Sagen) a million, billion times better than the stock unit. Spend the extra for the dual speed. You'll thank yourself later.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    42. Guest

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      Review by WISEGUY of Seabrook NH.
      1243641600
      May 29, 2009

      5.0 Great product at any price

      Pros:

      Strong Construction,Accurate

      Cons:

      Comments:

      This is a great product at any price and you would be hard pressed to find a better price.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    43. Guest

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      Review by Mike the amateur telescope builder of Central, PA.
      1243468800
      May 27, 2009

      5.0 "Great focuser" I'd like 3 more!!

      Pros:

      Strong Construction,Accurate,Smooth and Precise

      Cons:

      Comments:

      Great focuser, smooth, well made, has features usually costing hundreds more. I'd replace all my rack and pinion focusers with one of these!!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    44. BryanD

      BryanD New Member

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      Review by BryanD of Boston, MA.
      1243382400
      May 26, 2009

      3.0 Good but no Moonlite

      Pros:

      Cons:

      Comments:

      I bought it for an Orion XT8. Nice unit for the price but I wound up selling it to a fellow club member and got a Moonlite instead that was better for my purposes, but admittedly more expensive. The Moonlite was smoother, and had a linger drawtube which enabled more of my eyepieces to come to focus without needing an extension tube.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    45. AstroGuy1

      AstroGuy1 New Member

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      Review by jbrand of Illinois.
      1233705600
      Feb 3, 2009

      4.0 Great replacement focuser, good value

      Pros:

      Solid build,Smooth action,Compression rings,Easy installation

      Cons:

      Single set screw on adapt

      Comments:

      I recently ordered the GSO replacement focuser for my 10" GS (Antares) dob. The original R&P focuser was getting progressively worse over the last year or so - and I needed to do something. I had fitted the original focuser with Mercury Systems fine-focuser (FF-1) and had become very attached to that capability, so I ordered the dual-speed GSO model with the 10:1 fine focus option.I ordered it from Agena Astro. Due in large part to the scope being a GS - installation was a snap. No drilling. Screwdriver only. It literally took me longer to collimate following the installation than it did for me to install it. Anyone that is being put off by this because they are not *handy* need not worry. Seems to have a very solid, very smooth action. The fine-focus in particular is positively silky. Travel (in/out focus) seems to be identical to the original focuser - based on side by side eyeballing. It is a good bit heavier than the original - much more solidly built. Both 1.25 and 2" setscrews have compression rings. I may get a set screw with a larger head - easier to use with gloves on, but that is a pet peeve of mine. Tension is adjustable. I loaded it up with a set of Burgess binoviewers, Siebert OCA, and twin 32mm eyepieces and there is no slippage. This is pretty much the heaviest load I'll put on it. I've not yet had it under the sky (see aforementioned freezing rain), but anticipation is part of this hobby. A large part lately. So far been focusing down the hall and out the window, checking various orientations and loads. No issues.So far, this looks *very* promising.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    46. AstroGuy1

      AstroGuy1 New Member

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      Review by Wolf359 of Texas.
      1227052800
      Nov 18, 2008

      4.0 Good Budget Focuser With Some Quirks

      Pros:

      Dual speed is great,Smoother than RP focuser,Excellent value

      Cons:

      Can't handle heavy loads,Restricted out-travel

      Comments:

      I remember the first night after I got this focuser, I was so amazed at the improvement over the standard rack and pinion. The movement was so much smoother and the fine control of the dual speed was a delight. I was very happy until the day I got my 20mm Nagler Type 2 eyepiece. Wanting to quickly test out my new eyepiece, I plopped it into the dual speed focuser and watched in disbelief as the focuser tube collapsed down from the sheer weight. I attempted to tighten down the focuser, but this caused the focuser tube to completely lock up and not move with the fine knob (coarse knob still worked). Over the next few weeks, I discovered the functional weight limit of my focuser to be about two pounds - more than enough for 95% of the eyepieces out there, but not quite enough for the big boys. For those eyepieces, I could tighten down and use only the course knob. There are solutions to this which I've found on various sites around the web, but I have yet to get around to "doctoring" up my focuser. I am content to simply know my limits since, with the exception of this one problem, the focuser works like a charm. Overall, I would recommend this focuser to others provided they are not using huge eyepieces or a binoviewer. It has a very smooth action, the dual speed is great for high power viewing, and the price is about half that of the competition.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    47. jbrand

      jbrand New Member

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      1168642800
      Jan 12, 2007

      4.0 Great replacement focuser, good value, easy installation

      Pros:

      Smooth action, solid build, easy installation, compression rings.

      Cons:

      Single compression ring set-screw on 2" holder. Many 2" holders have 2 or more.

      Comments:

      I recently ordered the GSO replacement focuser for my 10" GSO (Antares) dob. The original R&P focuser was getting progressively worse over the last year or so - and I needed to do something. I had fitted the original focuser with Mercury Systems fine-focuser (FF-1) and had become very attached to that capability, so I ordered the dual-speed GSO model with the 10:1 fine focus option.

      It arrived today. I want to go on record as pointing out that there were clouds and freezing rain before it arrived. I **am not** responsible for those.

      Due in large part to the scope being a GSO - installation was a snap. No drilling. Screwdriver only. It literally took me longer to collimate following the installation than it did for me to install it. Anyone that is being put off by this because they are not *handy* need not worry.

      Seems to have a very solid, very smooth action. The fine-foucs in particular is positively silky. Travel (in/out focus) seems to be identical to the original focuser - based on side by side eyeballing. It is a good bit heavier than the original - much more solidly built. Both 1.25 and 2" setscrews have compression rings. I may get a set screw with a larger head - easier to use with gloves on, but that is a pet peeve of mine. Tension is adjustable. I loaded it up with a set of Burgess binoviewers, Siebert OCA, and twin 32mm eyepieces and there is no slippage. This is pretty much the heaviest load I'll put on it. I've not yet had it under the sky (see aforementioned freezing rain), but anticipation is part of this hobby. A large part lately. So far been focusing down the hall and out the window, checking various orientations and loads. No issues.

      So far, this looks *very* promising.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No
    48. Wolf359

      Wolf359 New Member

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      1165446000
      Dec 6, 2006

      4.0 Good Budget Focuser With Some Quirks

      Pros:

      Excellent value, dual speed is great for high powers, smoother than rack and pinion focusers.

      Cons:

      Can't handle heavy equipment, locking bolt restricts out-travel (remove if you need more extension).

      Comments:

      I remember the first night after I got this focuser, I was so amazed at the improvement over the standard rack and pinion. The movement was so much smoother and the fine control of the dual speed was a delight. I was very happy until the day I got my 20mm Nagler Type 2 eyepiece. Wanting to quickly test out my new eyepiece, I plopped it into the dual speed focuser and watched in disbelief as the focuser tube collapsed down from the sheer weight. I attempted to tighten down the focuser, but this caused the focuser tube to completely lock up and not move with the fine knob (coarse knob still worked). Over the next few weeks, I discovered the functional weight limit of my focuser to be about two pounds - more than enough for 95% of the eyepieces out there, but not quite enough for the big boys. For those eyepieces, I could tighten down and use only the course knob. There are solutions to this which I've found on various sites around the web, but I have yet to get around to "doctoring" up my focuser. I am content to simply know my limits since, with the exception of this one problem, the focuser works like a charm.

      Overall, I would recommend this focuser to others provided they are not using huge eyepieces or a binoviewer. It has a very smooth action, the dual speed is great for high power viewing, and the price is about half that of the competition.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No
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      Specifications

      Manufacturer GSO
      Focuser Telescope Type Reflector