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GSO Dovetail Mount for Dovetail Bar # FF561

5.0 (22 Reviews) Read Reviews Write Review
Brand GSO
Part Number FF561
Availability available

Product Info

Manufacturer Description

GSO's FF561 dovetail base will work with most Vixen-style dovetail rails/plates. It allows the user to change out equipment without the use of tools.

Specifications:

  • Precision CNC machined and black anodized
  • Large thumbscrew with a filleted brass retainer bolt
  • Secondary angled thumbscrew to ensure a secure fit
  • Holds any dovetail bar with a 1.7" base width
  • Weight: 8oz
  • Made in Taiwan

Please Note:

  • This is only available in a black anodized finish. It is not silver as shown in some of the photos above.
  • The dovetail bar shown in the fourth photo is for illustration only. It is not included with the dovetail mount.
  • Please use the detailed measurements we have provided in the photos to make sure that this will work with your dovetail bar or mount. We cannot tell you which mounts/dovetails this can or cannot work with. We cannot be responsible for any fit issues after you purchase this item. If you need any additional information, please ask us before purchase.

Reviews

5.0 (Based on 22 Reviews) 91% of reviewers recommended this product.
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    1. Guest

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      Review by Blaine K.
      1543119029
      Nov 24, 2018

      5.0 Well Built

      Pros:

      Cons:

      Comments:

      This was a bit larger and heavier than I expected but it is very high quality. I use it to lock my guide scope to Losmandy rail. Expected I would need two but since this is larger than I was expecting I ended up using one. The holes were drilled perfectly for the Orion 240mm guide scope.

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

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Roderick B.
      1528127098
      Jun 4, 2018

      5.0 Extremely Satisfied

      Pros:

      Cons:

      Comments:

      Received item and it has performed as advertised. One issue I had was that the 1/4x20 hole dimensions on website were incorrect. Overall very happy with purchase.

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

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by Thomas D.
      1517370301
      Jan 30, 2018

      5.0 FABULOUS

      Pros:

      Cons:

      Comments:

      Great everything! Superb machining, finish, function, price. Plenty of thru and threaded standard English to adapt to any application. I just finished incorporating into a custom trimmable mount, to use a Vixen VMC200L 8-inch scope as a... FINDER for my 36-inch observatory telescope!

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

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      Review by Curron H.
      1511783618
      Nov 27, 2017

      5.0 Saddle

      Pros:

      Cons:

      Comments:

      Very good fit and finish. Fitted perfectly

      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 Randy C.
      1505274273
      Sep 12, 2017

      5.0 Excellent Service

      Pros:

      Cons:

      Comments:

      Item as described and was actually better built than I expected. First Class not cheap stuff.

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

      This review was provided courtesy of AgenaAstro.com

    6. Guest

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      Review by Dean
      1503188808
      Aug 19, 2017

      5.0 As described

      Pros:

      Cons:

      Comments:

      Surprised with quality, fit and finish.

      I'll use this with my Carton Supernova mount that only comes with a mount plate so that I can use all my other scopes with it.

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

      This review was provided courtesy of AgenaAstro.com

    7. Guest

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      Review by Jason H.
      1495915903
      May 27, 2017

      5.0 Versatile Saddle

      Pros:

      Cons:

      Comments:

      This is an excellent addition to any set up. I attached it to the top of my refractor where it accepts either a finder, a guide scope, or a camera. It is better quality than the saddle on my alt/az mount and I wish I could switch them out. Don't hesitate to purchase this item, it is high quality.

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

      This review was provided courtesy of AgenaAstro.com

    8. Guest

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      Review by Van W.
      1493129007
      Apr 25, 2017

      5.0 Useful Tool

      Pros:

      Cons:

      Comments:

      I have several of these mount brackets that I have used for a range of mounting options. The bracket is well made and provides screw holes for attaching to any surface or tripod.

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

      This review was provided courtesy of AgenaAstro.com

    9. Guest

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      Review by David M
      1487765438
      Feb 22, 2017

      5.0 Works fine on my 3 mounts.

      Pros:

      Cons:

      Comments:

      I ordered 2 of these for my 2 equatorial mounts to use two 4 inch refractors with and they work just
      fine. Then I ordered another one for my Alt Alz mount for my 3 inch refractor. Just right for telescopes
      with a Vixen dovetail mounting rail.

      It is just what someone would need for telescopes with mounting rails on them.

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

      This review was provided courtesy of AgenaAstro.com

    10. Guest

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      Review by Dave of MS.
      1477440000
      Oct 25, 2016

      5.0 Works great on my mount

      Pros:

      Compact,Lightweight,Easy to Use,Strong Construction

      Cons:

      Comments:

      The GSO (FF561 ) dovetail mount adapter worked great on my equatorial mount for my 4 inch refractor. I bought two and will put the other one on another mount soon. Agena AstroProducts shipped it fast.

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

      This review was provided courtesy of AgenaAstro.com

    11. Guest

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      Review by Dan of Los Angeles.
      1439942400
      Aug 18, 2015

      5.0 Terrific Dovetail Mount for Dovetail Bar

      Pros:

      Easy to Use,Strong Construction

      Cons:

      Comments:

      A very well made and completely adaptable piece of equipment. I have an older Meade tripod. I mounted 2 of these great dovetail mounts in tandem, so the tripod can now hold any small to medium size telescope. I drilled 2 holes on each end of the tripod elongated swivel mount (where the telescope used to rest upon). Then I shimmed the difference in height from the swivel mount to the new dovetail mount with washers (the old mount was not straight across, it had about 1/2 inch drop at both ends (where the rings could be placed). Everything was then at an equal and level height. I mounted the new dovetail mounts with 2 bolts on each mount using washers, lock washers, and then tightened them down. Works and looks like it came with the tripod!! A great solution to update an older tripod, or to replace a mount.

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

      This review was provided courtesy of AgenaAstro.com

    12. Guest

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      Review by Max Headroom of Vail, AZ.
      1422662400
      Jan 30, 2015

      5.0 Excellent Product

      Pros:

      Strong Construction,Easy to Use,Lightweight

      Cons:

      Comments:

      I replaced a generic "plate" on a Meade LXD 500 mount with this dovetail mount. It went on with no modifications. I guess there is some standardization of hole spacing on telescope mounts. Now the Meade can be used with 3 of my telescopes with no difficulty. Really worth it.

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

      This review was provided courtesy of AgenaAstro.com

    13. Guest

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      Review by Van Webster of Los Angeles, CA.
      1410134400
      Sep 7, 2014

      4.0 Useful Tool

      Pros:

      Lightweight,Easy to Use,Strong Construction

      Cons:

      Comments:

      This is a handy adaptor that can be attached to a tripod head or to a telescope accessory rail to permit the mounting of instruments fitted with a Vixen style dovetail mounting bar. It is well constructed, operates smoothly and includes two mount locking screws for a secure fit. There are multiple mounting holse in the base, some tapped for 1/4"-20 threades that make attching this adaptor easy to acomplish. I would limit the payload of any instruments attached to this adaptor to 15 pounds or less. I have two of them.

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

      This review was provided courtesy of AgenaAstro.com

    14. Lowjiber

      Lowjiber New Member

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      Review by Lowjiber of Las Vegas, Nevada.
      1401494400
      May 30, 2014

      5.0 Almost a "Work of Art"

      Pros:

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

      Cons:

      None

      Comments:

      I needed to modify an older Mizar mount to accept a Vixen-style rail. Knowing GSO's reputation for quality components, I didn't hesitate to order this dovetail mount. When it came, it was so well designed and manufactured that I just wanted to sit and look at it. It was on my desk the day after it arrived and my astronomy buddy came by and was also impressed.

      The CNC machining is up to GSO's usual high-standards. The impressively large, knurled thumb screw and locking screw leave no doubt that my fairly heavy Newtonian scope will be firmly installed on the mount.

      As a retired engineer, I was also impressed with the combinations of countersunk mounting holes that are part of the design.

      One cannot go wrong with this product.

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

      This review was provided courtesy of AgenaAstro.com

    15. Lowjiber

      Lowjiber New Member

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      Review by Lowjiber of Las Vegas, Nevada.
      1394236800
      Mar 7, 2014

      5.0 Quality has to be seen to be believed.

      Pros:

      Versatile,Beautifully Machined,Accurate,Strong Construction

      Cons:

      Comments:

      I have a thirty year old Mizar Eq mount that is built like a tank. The equally old 6" Newtonian's mirrors finally subcumbed to the atmosphere and began to rapidly deteriorate. I found a new 6" OTA for sale on eBay and bought it for a literal songm still in the original crate. It came with new rings on a Vixen style mounting bar, but my old mount didn't have the base that would accommodate it.

      Naturally, the first place I looked was to AgenaAstro for a solution. This thing is a beauty. The workmanship are beyond belief. It sat on my desk for a couple of days until I could get it ready to meet the mount, and I had two people (who didn't even know what it was) marvel at the precision with which it was CNC machined.

      Thee are a variety of mounting combinations designed in the base. However, I had to do a bit of lapping work to get it ready for the very old mount. It appears to be made of a fairly soft variety of steel and is easy to work with, yet solid as a rock.

      The main knurled mounting knob is a nice size, much larger in diameter than on some bases one sees attached to today's Eq mounts. Likewise, the locking knob is of sufficient size to give the user a feeling of safety when installing the dovetail.

      I highly recommend this product!

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

      This review was provided courtesy of AgenaAstro.com

    16. rmscott59

      rmscott59 New Member

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      Review by rms of San Francisco, CA.
      1391817600
      Feb 7, 2014

      5.0 HIGH QUALITY MOUNT!!

      Pros:

      Strong Construction,Compact,Easy to Use,Lightweight

      Cons:

      Comments:

      I needed a quality Vixen style dovetail mount and this GSO mount is ABSOLUTELY PERFECT! It's easy to mount (there are a combination of mounting configuration holes that can be used) and it's relatively compact. But don't be fooled by its light weight and compact size!! This mount is QUALITY MACHINED and VERY STURDY. Oversized tightening knob makes it a dream to snug down your OTAs SECURELY. An OUTSTANDING item! It doesn't hurt that Agena is THE BEST astronomy site on the web...GREAT PEOPLE!!!!

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

      This review was provided courtesy of AgenaAstro.com

    17. rainguy

      rainguy New Member

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      Review by rainguy of Lake Oswego, OR.
      1386547200
      Dec 8, 2013

      5.0 Rock Solid Photo Tripod Complement

      Pros:

      Easy to Use,Lightweight,Compact,Strong Construction

      Cons:

      Comments:

      I was looking for an alternative to the 1/4 x 20 threaded bolt that is the standard on even expensive photo tripods, something that would provide a more solid, stable, and safer platform for my 20x80 astronomy binoculars, Stellarvue-80ED refractor, and several smaller telescopes that I use often in a grab and go capacity. I wanted to end up with a Vixen-style dovetail platform that would allow me to quickly switch out one instrument for another in the dark, and obviate the need to use the 1/4 x 20 threaded connector every time I wanted to move from the binocs to the SV-80 to, say, a 90mm refractor or a long tube 70mm.

      I emailed Agena with a description of what I wanted; they got back to me very quickly and included the Agena link to this compact little "hockey puck" GSO dovetail mount. It connects to the tripod mount via a 1/4 x 20 on the underside and provides a smooth, impeccably-machined dovetail slot on the top side while adding very little weight. I've used this set up a half dozen times, and it works flawlessly. SO much better than the 1/4 x 20 bolt.

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

      This review was provided courtesy of AgenaAstro.com

    18. Guest

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      Review by chris of Willoughby Ohio.
      1336953600
      May 13, 2012

      5.0 GSO Dovetail mount - a good unit

      Pros:

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

      Cons:

      Comments:

      I bought this to convert an old-style Orion AstroView mount from tube rings to dovetail. I drilled and tapped into a small aluminum bar, attached the GSO dovetail mount and bolted this on where the rings used to go. Now I have a good medium-duty grab&go mount with the ease of dovetail mounting. It is a good unit.

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

      This review was provided courtesy of AgenaAstro.com

    19. Guest

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      Review by unitron of Eaton, CO.
      1293408000
      Dec 26, 2010

      5.0 Very well made

      Pros:

      Strong Construction,Accurate

      Cons:

      Comments:

      Used this product to convert one of my old standard mounts to accept dovetail bars, works just great.

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

      This review was provided courtesy of AgenaAstro.com

    20. Guest

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      Review by telescope tom of Tucson AZ.
      1292803200
      Dec 19, 2010

      5.0 The Perfect Dovetail Clamp

      Pros:

      Cons:

      Comments:

      A nice sturdy Vixen dovetail clamp to replace a cheaper version or to upgrade an older mount, this is perfect!

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

      This review was provided courtesy of AgenaAstro.com

    21. eric_zeiner

      eric_zeiner New Member

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      Review by Eric R. Zeiner of North Georgia, USA.
      1282608000
      Aug 23, 2010

      5.0 Very Nice Product

      Pros:

      Strong Construction,Beautiful fit and finish

      Cons:

      Comments:

      I ordered this Dovetail Adapter to perform an upgrade on an AZ3 type alt/az mount that I have. The reason I did so was to make the mount more user friendly and versatile in its implementation. You could say that this is an ATM project and to some degree it is as I am creating something that is unique. I also plan on purchasing another to use on a custom one of kind alt/az mount that I built from the ground up. GSO products have always served me well and they do possess a very distinct bang for your buck feature. This dovetail adapter is very well designed, the machining, fit and finish rival similar items costing many times more. The beauty of these also lies in the fact that they can be used singly for smaller scopes or in tandem for bigger setups and they also can be mounted vertically or horizontally while still performing well.

      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 AstroNutz of Phoenix, AZ.
      1264032000
      Jan 20, 2010

      5.0 Works great with Takahashi Teegul mount!

      Pros:

      Strong Construction,Accurate

      Cons:

      Comments:

      $55 cheaper than the Tak version of this dovetail adapter and fit on my Lapides Modified Teegul mount like a glove! Black color matches well and holds scope securely. What more could you want?

      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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