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GSO 2" SuperView Eyepiece - 30mm

4.4 (45 Reviews) Read Reviews Write Review
Brand GSO
Part Number SV30
Availability available

Product Info

Manufacturer Description

Since their introduction in the US market a few years ago, the GSO SuperView series of wide-field eyepieces have taken the amateur astronomy community by storm. These are, by far, the best-selling GSO eyepieces. With an expansive apparent field of view (AFOV) ranging from 60 - 68 degrees, users will experience incredible views without breaking the bank or impinging on your scope's balance.  SuperView eyepieces are available in 2 barrel sizes (1.25" or 2') and 5 focal lengths (ranging from 15mm to 50mm).

Images are virtually free of chromatic aberration or pincushion distortion with excellent flatness of field and eye relief. These eyepieces feature rubber grips on the housing and foldable rubber eyeguards. All eyepieces are fully multicoated, have blackened lens edges for improved contrast, and come with two end caps.

Guan Sheng is a leader in optical telescopes and accessories and their products have been sold for years by the "Big Three" (Meade, Celestron and Orion) under their own brand names. Give these a try - you will not be disappointed!

Reviews

4.4 (Based on 45 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      Review by Jim J.
      1550371853
      Feb 16, 2019

      5.0 Good views

      Pros:

      Cons:

      Comments:

      The GSO 30mm 2 inch is a good match for my 120mm doublet. Great clarity on center focus under dark skies. I enjoy looking through my new refractor even more than before!

      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 Edward
      1548985099
      Jan 31, 2019

      5.0 Great Eyepiece

      Pros:

      Cons:

      Comments:

      Was very surprised with the performance - extremely clear and crisp.
      In my Bresser AR152/1200 it works well, but in the AR102/1000 it was FANTASTIC!!!!
      Views better than a similar, high-dollar Explore Scientific eyepiece, which had less clarity and was yellowish compared to the GSO.
      A Keeper!!!

      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 Michael L.
      1545536835
      Dec 22, 2018

      5.0 GSO 30 mm EP

      Pros:

      Cons:

      Comments:

      This is a very good EP at a very good price.

      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 Errol S.
      1536515371
      Sep 9, 2018

      4.0 GSO SuperView 30mm & 42mm

      Pros:

      Cons:

      Comments:

      Purchased both the GSO SuperView 30mm and 42mm 2" inch EPs just to expand my collection. Quality of EPs is excellent. Great eye relief and gives nice bright crisp views. Very good quality for a cheap price. Just wish they made some in higher magnifications. Not on the level of Explore Scientific or Televue, but also doesn't carry the extreme price tags. If your on a budget and wanting a decent wide FOV EP, I would definitely recommend the GSO SuperView 30mm and 42mm. 
      Scope: Celestron C8 SCT 
      Uses: Planetary, Moon, and finding DSOs

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

      This review was provided courtesy of AgenaAstro.com

    5. BHendricks

      BHendricks New Member

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      Review by Bill H.
      1534029618
      Aug 11, 2018

      5.0 Best view of TDC I ever had

      Pros:

      Cons:

      Comments:

      Best view of The Double Cluster I've ever had was using a 30mm SuperView on a 10" F/5 reflector during a star party. Nuff said for me.

      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 Christopher C.
      1525045892
      Apr 29, 2018

      5.0 Great optic

      Pros:

      Cons:

      Comments:

      Good value here. I use this mostly for looking at the moon. 9.25 SCT telescope. I am happy with the views I get with this piece.

      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 Michael B.
      1518020338
      Feb 7, 2018

      5.0 Beautiful to look through

      Pros:

      Cons:

      Comments:

      I'm using this on my 8" SCT and getting beautiful views through it. 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

    8. Guest

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      Review by Russell L.
      1494528065
      May 11, 2017

      5.0 Great value for long focal length OTA's

      Pros:

      Cons:

      Comments:

      This eyepiece performs well at F/10, but on an F/15 150mm refractor it truly is a super view eyepiece. I probably would not recommend this eyepiece for use with a fast Newtonian but on an SCT or other long focal length scope it is a keeper.

      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 Warwolf of Puerto Rico.
      1475971200
      Oct 8, 2016

      5.0 Great Value! Can't go wrong with GSO

      Pros:

      Strong Construction,Accurate,Quality Lenses

      Cons:

      Comments:

      As with many GSO products, quality and price ratio are good. Eye relief and field of view are great. Works very well for finding objects before zooming in and perfect for larger objects. I bought this along with the 2x barlow and love the combo!

      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 Rob of Phoenix, AZ.
      1457740800
      Mar 11, 2016

      4.0 Great value

      Pros:

      Quality Lenses

      Cons:

      Heavy

      Comments:

      Great afov, is one if my favorite lenses. Will definitely purchase other lenses by same mfg.

      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 Chuck of Colorado.
      1444521600
      Oct 10, 2015

      3.0 A reasonable eyepiece at a good price

      Pros:

      Comfortable Eye Relief

      Cons:

      Some Astigmatism At F8

      Comments:

      A good finder and big object eyepiece in slower scopes (f/7 and up). Has very comfortable eye relief and is pleasant to use. The only fault is that it exhibits a fair amount astigmatism in the outer third of the field even at f/7.5. However, in defense of the GSO 30mm, while there are eyepieces that show pinpoint stars across the field, those eyepieces cost several times as much. If you're on a budget and seeking to move up from a 1.25" eyepiece as your lowest power eyepiece, this is a decent choice and a good upgrade.

      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 Troy of York, SC.
      1440979200
      Aug 30, 2015

      5.0 Great bang for the buck!

      Pros:

      Cons:

      Comments:

      I got this because I wanted to see what two inch eyepieces were like without spending a fortune. I spent over a week researching and trying to pick the right one. I wanted a wide FOV, but didn't want to exceed my f/4.9, 10" dob's minimum useable magnification. Doing the math I could go up to a 32mm eyepiece, so this one was definitely close enough to minimum magnification. Exit pupil was also a big consideration, I wanted as bright an image as I could get. The calculations said this would give me a 6mm exit pupil (perfect for my age). All the 32mm eyepieces I looked at had an exit pupil that was too big. I checked the FOV calculations, this was definitely smaller than a 32mm eyepiece with a larger AFOV, but it still gave me a larger TFOV than any other eyepiece I have. With so much going for it and a low price to boot, I pulled the trigger. The eyepiece did not disappoint on brightness. It is easily the brightest I have. Eye placement is very forgiving. I noticed no blackouts as I moved my eye around to take the whole view in. Eye relief was also very comfortable for me (I don't wear glasses when I observe). The sharpness on axis is very nice, pinpoint stars through 60-70% of the FOV. The edges drop off a good bit, with seagulls visible as you approach the very edge. The thing is, the FOV is so wide, when you are looking at an object, you don't even notice the edges. My focuser is not long enough to insert the eyepiece all the way. I had to back it out about an inch, but it seemed to be in there securely enough. I can't wait to get it to a dark sky site. This eyepiece will get a lot of use and will probably be the only one I ever need.

      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 rocket9244 of Omaha Nebraska and Elgin Illinois..
      1436918400
      Jul 14, 2015

      5.0 Great eyepiece

      Pros:

      Lightweight,Quality Lenses,Accurate,Easy to Use,Strong Construction

      Cons:

      Comments:

      This is the best eyepiece I have at the moment and it has never failed to give me outstanding views. The first time I used it I was taken away by the wide view. The clarity is excellent and pin point on stars. Orion nebula looked like I could reach out and touch it.

      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 Max Headroom of Vail, AZ.
      1409961600
      Sep 5, 2014

      4.0 Great eyepiece for the money

      Pros:

      Lightweight,Strong Construction,Quality Lenses

      Cons:

      Comments:

      This eyepiece is lightweight and has good image quality in my telescopes having focal ratios greater than f/6. It is comparable to good quality erfle or konig eyepieces in the 30 to 32mm range. The only drawback for me is the lack of a field stop. However, a suitable o-ring from a hardware store, inserted in the right place in the barrel, makes an effective one. I am pleased with this eyepiece.

      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 Jeff W of Philadelphia, PA.
      1386115200
      Dec 3, 2013

      4.0 Excellent Economical Eyepiece

      Pros:

      Quality Lenses,Easy to Use,Strong Construction

      Cons:

      Comments:

      This is my first and, thus far, only 2" eyepiece, so I have to remove the 1.25" eyepiece adapter from my Orion XT10's focuser in order to use it and then the focuser has just barely enough travel to allow an image to be brought into focus. For that reason, I find it advantageous not to allow the eyepiece to settle all the way down into the focuser. Instead, I use the screws to hold it in place just short of all the way in, so that objects can come into a clear, sharp view from both sides of their optimal focus points.

      Despite these minor inconveniences, which are hardly the fault of the eyepiece, it has become my favorite finder piece. Whenever I need to look at a big piece of the sky, I plug it in. Its field of view takes in far more than any of my 1.25" plossls can deliver. The plossls probably beat it for crispness on big, bright objects, like the moon and the planets, but I didn't buy it for the moon and the planets. I bought it to help me explore and enjoy the further and dimmer "deep space objects", and I think it does an admirable job in bringing them home to me without sending me to the poor farm.

      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 FJS440 of Avon, OH.
      1369958400
      May 30, 2013

      5.0 I like it.

      Pros:

      Strong Construction,Quality Lenses,Accurate,Easy to Use

      Cons:

      Comments:

      Great buy for the money. I love the clear wide angle views through the EP.

      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 Symptotic of Houston TX.
      1355270400
      Dec 11, 2012

      5.0 Very happy with this eyepiece.

      Pros:

      Easy to Use,Strong Construction,Quality Lenses,Accurate

      Cons:

      Comments:

      Good quality eyepiece for a reasonable price. I am just starting out in this hobby, and this was a relatively big step up from the standard eyepieces that came with my scope. It is one of my favorites so far.

      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 AleToTheThief of Las Vegas.
      1341878400
      Jul 9, 2012

      5.0 Fantastic budget wide angle lens

      Pros:

      Strong Construction,Easy to Use,Accurate,Quality Lenses

      Cons:

      Comments:

      This was my first lens I bought after my initial scope purchase, and all the good things I had heard about GSO lens were confirmed. Fantastic eye relief and field of view. Busy saving for the barlow now.

      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 Atom B of Phoenix, AZ.
      1307232000
      Jun 4, 2011

      4.0 Great value!

      Pros:

      Build Quality,Lightweight

      Cons:

      A little soft on the edge

      Comments:

      This makes a great finder EP. It is compact, and lightweight by comparison to similar focal lenght 2-inch EPs. Plenty of eye relief for comfortable eye placement. At f/6, a little soft at the edge of the field. Good value for the money.

      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 killerkrom of Abbotsford, BC.
      1303344000
      Apr 20, 2011

      4.0 Excellent wide view eyepiece

      Pros:

      Quality Lenses,Accurate,Strong Construction

      Cons:

      Comments:

      I really like the wide views I get with this eyepiece. It is constructed very well, and just feels very well made. The view is sharp and crisp, up to very close to the edge. I has become my most used eyepiece. Excellent buy.

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

      This review was provided courtesy of AgenaAstro.com

    21. Guest

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      Review by ndk of Estes Park, CO.
      1294012800
      Jan 2, 2011

      5.0 Stellar Eyepiece

      Pros:

      Strong Construction,Accurate,Quality Lenses

      Cons:

      Low magnification

      Comments:

      This is by far my favorite eyepiece. The eye relief is fantastic, making it comfortable and easy for me and others to use. The views are crisp, sharp, and beautiful. Touring around a very dark sky with this nearly 2

      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 FG of Montevideo, South America.
      1272758400
      May 1, 2010

      5.0 Nice eyepiece

      Pros:

      Quality Lenses

      Cons:

      Comments:

      The GSO optics is as good as the optics of the big brand names. This 2" eyepiece fits perfectly in my also GSO 2" dielectric mirror diagonal. I strongly recommend both.

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

      This review was provided courtesy of AgenaAstro.com

    23. Greg

      Greg New Member

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      Review by Greg of Canada.
      1263859200
      Jan 18, 2010

      4.0 GSO 2" 30mm Eyepiece

      Pros:

      Accurate,Lightweight,Quality Lenses

      Cons:

      None

      Comments:

      I purchased the GSO 2" SuperView 30mm eyepiece from Agena Astroproducts a while ago and I've used it many, many times. I mainly use this eyepiece for deep-sky viewing which it is well suited for (especially the larger open clusters, the Double cluster of Perseus is simply stunning through this eyepiece, as is the beehive cluster), the 30mm focal length isn't ideal for planetary viewing. I am really impressed with the suprisingly lightweight design and the views I get from it, they are sharp, crisp and quite wide. I also noticed that the comma problem I usually get (I have a fast 10" Dob) is not nearly as pronounced as I get with my other eyepieces of similar size. Unfortunately I can't comment on the accuracy of the colors as I'm colorblind, however, I haven't noticed any major chromatic aberration with this unit.
      If you're looking for fantastic views of the night sky while not forking out a lot of your hard earned cash, then I highly recommend this eyepiece.

      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 Steve in Florida of Apopka, FL.
      1252368000
      Sep 7, 2009

      4.0 Welcome To The Big Sky

      Pros:

      Strong Construction,Quality Lenses,Accurate

      Cons:

      Had to adjust seating

      Comments:

      I bought this eyepiece for my Zhumell 8" Dobsonian telescope. I found I had to pull it out just a bit from the focuser (the only thing keeping it from being a 5-star review), but that was no big deal. The eyepiece is sturdy with quality optics, giving me that great "lost in space" view I'd heard so much about. A great eyepiece that exceeded my expectations.

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

      This review was provided courtesy of AgenaAstro.com

    25. Guest

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      Review by Ray of Columbus, GA.
      1244419200
      Jun 7, 2009

      4.0 Very nice eyepiece

      Pros:

      Strong Construction,Quality Lenses

      Cons:

      Comments:

      An amazing eyepiece for the money. The eye relief is just about perfect and eyeglass wearers will be very pleased with well-made, fold-down eyecups. The image is bright and sharp to about two/thirds of the field. I think the 30mm is the best of the series.

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

      This review was provided courtesy of AgenaAstro.com

    26. Guest

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      Review by NetMatt of Atlanta, GA.
      1243814400
      May 31, 2009

      4.0 1st wide view eyepiece, very good

      Pros:

      Strong Construction,Low cost,Clear View

      Cons:

      Heavy

      Comments:

      This eyepiece was my first wide view and 2 inch eyepiece. Based on the review on forums, it was recommended, and I am happy with the purchase. It is very clear to me, and I really like the wide view. I have never used the really high-dollar eyepieces, so I cant compare them, but I would recommend this if you are a backyard astronomer like me! Cost and value are great! The weight was surprising, as my Dob would tend to lean more, but I think that is the same with any 2 inch eyepiece.

      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 Justin of Sterling Heights, MI.
      1243468800
      May 27, 2009

      4.0 Great Eyepiece for the Price

      Pros:

      Strong Construction,Quality Lenses

      Cons:

      Comments:

      This is a great eyepiece for the price. I have a fast f4 scope so with larger eyepieces the quality of the image usually becomes worse. This is not the case for this eyepiece. The quality of the images is great and the price is also well worth it.

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

      This review was provided courtesy of AgenaAstro.com

    28. Guest

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      Review by Ron Merkord of Fillmore, CA.
      1243468800
      May 27, 2009

      5.0 Excellent eyepiece.

      Pros:

      Strong Construction,Quality Lenses,Accurate

      Cons:

      Comments:

      Using this eyepiece with my 10 inch F/8 telescope, the GSO's are my favorite 2 inch eyepieces. Large lens diameter and comfortable working distance combine with crystal clear optics for a great image. The antireflection coatings are also the best I've seen.

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

      This review was provided courtesy of AgenaAstro.com

    29. Guest

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      Review by Temujin of NYC.
      1243382400
      May 26, 2009

      5.0 Great Bargain Wide-Field EP

      Pros:

      Superb Value,Quality Lenses

      Cons:

      Comments:

      If you need a wide-field EP and don't want to spend hundreds of dollars for a Tele Vue Panoptic or Nagler, then look no further. The GSO SuperView is a great bargain wide-field EP. It works well in my f/6 scope. In faster scopes, you may need a paracorr.

      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 mhuston6 of Florida.
      1243036800
      May 22, 2009

      4.0 GSO SuperView 30mm

      Pros:

      Price,Agena bolt case,Larger lens,I like the views

      Cons:

      Some edge distortion,Some loss of contrast

      Comments:

      I have been using this 2" 30mm eyepiece for several nights in my C8 f/10 SCT and I have seen pretty good views through this. Specifications indicate this as a wide field eyepiece. But it is kind of strange that when I use this 2" 30mm in my SCT with a 2" visual back and then compare the view to a 1.25" 32mm which has a FOV of 44 degrees, the image is the same! I see the same stars in the view with either eyepiece. I viewed Jupiter through this until it drifted out of the eyepiece and it does show some edge distortion on bright objects, but this Superview seems to be a very nice accessory for me and works great with my C8, especially when you are on a tight budget like I am. I can't compare this to fancy $200 eyepieces because I just wouldn't personally spend that much for one. I don't know all the fancy mumbo-jumbo technicalities about how these are made, but it has made my viewing much better. It comes with a smooth action bolt case and both end caps.

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

    31. AstroGuy1

      AstroGuy1 New Member

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      Review by viperbob of New Jersey.
      1237852800
      Mar 23, 2009

      4.0 GSO Super View 30mm 2 inch eyepiece

      Pros:

      Price is right,Wide view for a 2 inch EP,Well Made

      Cons:

      FOV may be less,Some sea gull effect in

      Comments:

      What a pleasant experience it was to go out last night here in New Jersey and check out my new and only 2 inch eyepiece that I received from Astronomy Ratings (Grand prize winner). The skies here were excellent, considering how close I am to New York City, and it was an opportunity I couldn't miss.

      The contrast was excellent and the stars/planet were pin point to about 70% and the balance of 30% was not bad. This was using my LX-90 f/10 SCT telescope. The background was almost totally black and the nice green tint on the glass was nice. I have no way of checking out the status on the FOV but it was wider than my standard plossl. Eye relief is nice at 15mm and there are 5 glass elements. This appears to be an excellent, well made eyepiece and is fitted for filters. Since I don't have two I can't check them out in my binoviewer but it's a thought for the future.

      This eyepiece is a keeper for me. It is a shame this eyepiece is not parfocal with the 20mm, as being able to use the GSO Super View 20mm without changing the focus. Also this GSO eyepiece doesn't seem to be very heavy since it is so much bigger - actually it is not much heavier than my 32mm Televue plossl. Nice feature.

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

      This review was provided courtesy of AgenaAstro.com

    32. skooter60

      skooter60 New Member

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      1237472040
      Mar 19, 2009

      5.0 Excellent Buy

      Pros:

      Solid Construction, fairly lightweight, clear views.

      Cons:

      None

      Comments:

      I am very happy with this EP. I've used it in an f/5 reflector and the views are crisp almost to the edge. The Pleiades and Double Cluster were fantastic and that's from a very light polluted area. Quite an improvement of the stock 26mm I got with my dob. I also ordered the 15 mm and 20 mm.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No
    33. skooter60

      skooter60 New Member

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      Review by Skooter60 of Hatfield PA.
      1237334400
      Mar 17, 2009

      5.0 It's A Keeper

      Pros:

      Quality Lenses,Strong Construction

      Cons:

      Comments:

      I have been looking for a reasonably priced wide field EP for use in my F/5 10" reflector for a while and this is a keeper. The views are crisp almost to the edge. The Pleiades fit comfortably in the field of view as did the double cluster. The EP is big but not too heavy. Next I will give it a try in my F/5 refractor to see how it performs. I already ordered the 20mm can't wait.

      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 Baja observer of Tijuana, B.C..
      1235001600
      Feb 18, 2009

      4.0 Nice field of view

      Pros:

      Cons:

      Comments:

      This eyepiece is great, its very light, I have a problem with my short refractor because the balance point is way to back and the two screw holes that have for attachment are in front of that so a light eyepiece for me is a must. On f/6 the seagulls that appear on the edge of field are not a problem, you realy need to be looking for that in order to notice them, in my friend 80mm f/9.4 they are non existent. I love the widefields on the milky way using this eyepiece, I have a friend that has a 27mm Panoptic and of course it is better.

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

      This review was provided courtesy of AgenaAstro.com

    35. AstroGuy1

      AstroGuy1 New Member

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      Review by wrose of Colorado.
      1233619200
      Feb 2, 2009

      4.0 Best Buy for the Money

      Pros:

      Excellent finder EP,Well built,Great Value

      Cons:

      Some edge aberration

      Comments:

      One of the best buys for the money I've found lately. My initial findings compare similarly to those of the other reviewers. It is the best overall wide angle eyepiece in its price range I've found. Unlike some others it's build using standard materials and has a metal barrel so it just 'feels better' than some of the plastic eyepieces being sold in this price range. There are a few of these others that have equal optics but the overall construction of this eyepiece puts it a definite notch above them.

      I was looking for a decent 'finder eyepiece' for use with my DOB at Public Star Parties that I wouldn't have to worry too much about. I was using another brand 28mm Wide Angle but was hoping to find something with a little wider FOV and maybe a little less aberration. Agena Products sent me this eyepiece and it has been great. The light transmission, contrast, and detail in the central 2/3's of the FOV blows the 28mm I was using away. While there's definite aberration in the outer 25% in my f/5.6 DOB, this eyepiece is far better than the vast majority of similar focal length wide angle EPs that costs less than $100.

      Out of curiosity I've tried this eyepiece in my C9.25 SCT and was pleasantly surprised. It certainly will not compete with high priced eyepieces but definitely holds its own against any other 30mm wide field that costs twice as much. In the slower C9.25 this eyepiece has far less edge issues and is a very nice "knock around" wide field for use as a finder and generally scanning around. I can recommend this eyepiece to anyone looking for a wide field, 2" eyepiece for under $100.

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

      This review was provided courtesy of AgenaAstro.com

    36. melonman

      melonman New Member

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      Review by melonman of Minnesota.
      1227830400
      Nov 27, 2008

      4.0 Another review of the 30mm Superview EP

      Pros:

      Probably real good at f7,Decent at f5,Good finder eyepiece

      Cons:

      Aberration in fast scopes

      Comments:

      Just wanted to add that the other review of this eyepiece is almost exactly the same as my own. The 30 mm does a little better on my 8" F/6 dob than in my F/5. It makes a good finder eyepiece and gives decent views to the edge with stars of low magnitude. But brighter stars flare in the outer 25% of the FOV. That being said, when I purchased mine from Agena AstroProducts I could find no other "finder" eyepiece of this quality for less. I might add, that for an older person, you supposedly will see no increase in the surface brightness of objects in any eyepiece beyond 30mm at F/5 (eyepiece mm/focal ratio of scope) (30/5) because our eyes only open to about 6mm. That means you could use the 42mm in an f/6 and probably get a bigger total FOV.

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

      This review was provided courtesy of AgenaAstro.com

    37. AstroGuy1

      AstroGuy1 New Member

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      Review by Wolf359 of Texas.
      1226966400
      Nov 17, 2008

      4.0 The Definition of "Bang for Buck"

      Pros:

      Good build quality,Lightweight,Nice eye relief,Exclnt price-performance

      Cons:

      Edge performance in Fast

      Comments:

      I actually got this eyepiece free with a scope purchase and was a bit surprised at its performance. No, it couldn't compete with my premium eyepieces costing 6 times as much, but when you consider that these eyepieces sell for little more than an ordinary plossl, their value is very impressive. In my f5 Dobsonian, the SuperView was sharp out to about 2/3rd's of the field. Stars were noticeably distorted beyond that. However, the sharp portion of the field is about equivalent to that of a standard plossl while the extra remaining field definitely adds to the immersive experience. Eye relief was very good as well and the eyepiece was very light compared to other widefields I've used of similar focal lengths. I would definitely recommend this eyepiece to someone who wants a widefield eyepiece but doesn't want to spend the big bucks.

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

      This review was provided courtesy of AgenaAstro.com

    38. calastro

      calastro New Member

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      1209405780
      Apr 28, 2008

      4.0 Very good eyepiece for the price!

      Pros:

      Excellent price! Great eye relief! Sharp optics!

      Cons:

      Not as much AFOV as the 42mm in this series.

      Comments:

      I purchased the 30mm at the same time as the 42mm. I was expecting very similar results but actually found the two eyepieces to be a good bit different! Like the 42mm, I tested the eyepiece in my 100mm f/6 achromatic refractor. And like the 42mm, the image was perfectly sharp across the entire field of view! What was noticeably different was the AFOV. The 30mm appears to be considerably less that the 42mm. I'm not saying it's a bad eyepiece, it's just that I was expecting a little more AFOV from this eyepiece. The AFOV is considerably less than that of a 60+ year old 30mm military surplus Erfle that I use a lot. I was so impressed with the 42mm in this scope that it was just a little bit disappointing. It is still a good eyepiece and I will use it for public star parties and other events. Maybe, it's just not as good a match with this scopes optical system as the other eyepieces.

      I still say it a good eyepiece and is excellent for the price.

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

      stargazertony New Member

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      1203015420
      Feb 14, 2008

      4.0 GSO 30mm SuperView

      Pros:

      Price, Construction, FOV, Lightweight, Sharp Image

      Cons:

      Coma in outer 15% with f5 scope.

      Comments:

      I have had this eyepiece for a while and have really enjoyed it. It is a decent 5 element 2" eyepiece, and it has a very nice feel. The construction of the eyepiece is good and rugged. Optics are good and the coatings look very good with no flaws. I use it in my f5 dob and it performs well. I notice a little coma at about 85% but I have seen worse. I paid about $59 for it and I mainly use it at star parties and it is just fine for that. The FOV is nice and I can get M31, M32, & M110 all in the same view. I recommend this as a good all around wide FOV eyepiece.

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

      alanoodle Member

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      1192212360
      Oct 12, 2007

      4.0 Excellent Big View at a Great Price

      Pros:

      Very inexpensive, sharp view, good contrast, wide view.

      Cons:

      Slight loss of focus at the edge of the field.

      Comments:

      Like some of the other reviewers, I received the GSO Superview 30mm eyepiece from Agena AstroProducts as the Astronomy Ratings Monthly Grand Prize. After using it, I'd be just as happy with it if I'd paid the full $58.00 price.

      The SuperView 30mm is a handsome eyepiece with a black anodized metal body, a rubber grip and rubber eye-guard, making it resemble more expensive 2-inch eyepieces. The plated barrel is notched for a lock-screw and is threaded for 2" filters.

      I was equally impressed with the 30mm Superview's performance in my 120mm f/5 refractor. Eye relief was comfortable enough to use with my glasses on (though because of my gradient lenses I prefer to view without them). The view showed pinpoint stars at the center and had a pleasing level of contrast without any ghosting. Though there was, as is the case with most economy-priced long focal length 2" eyepieces, a slight loss of focus towards the edge of the field, this was less noticeable than that of my Orion Deep View 35mm, a comparable 2" eyepiece that sells for almost $20 more than the Superview. (More than that if you consider that Orion DOES charge for shipping, whereas Agena does not!) While it did not give the "Spacewalk" effect of more expensive (MUCH more expensive) premium 2" eyepieces, the "Porthole" effect of the 30mm Superview was very satisfying.

      In conclusion, the GSO SuperView 30mm eyepiece is an excellent 2" wide-field eyepiece for the Budget Astronomer. While this eyepiece will never outperform any of the wide-field eyepieces costing several times more, it exceeds expectations given the low price.

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

      viperbob New Member

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      1186917480
      Aug 12, 2007

      4.0 GSO Super View 30mm 2 inch eyepiece

      Pros:

      Price is right, well made, wide view for a 2 inch eyepiece.

      Cons:

      The FOV may be less than advertised, some sea gull effect in the last 30%

      Comments:

      What a pleasant experience it was to go out last night here in New Jersey and check out my new and only 2 inch eyepiece that I received from Astronomy Ratings (Grand prize winner for July '07). The skies here were excellent, considering how close I am to New York City, and it was an opportunity I couldn't miss.

      The contrast was excellent and the stars/planet were pin point to about 70% and the balance of 30% was not bad. This was using my LX-90 f/10 SCT telescope. The background was almost totally black and the nice green tint on the glass was nice. I have no way of checking out the status on the 70 degree FOV but it was wider than my standard plossl. Eye relief is nice at 15mm and there are 5 glass elements. This appears to be an excellent, well made eyepiece and is fitted for filters. Since I don't have two I can't check them out in my binoviewer but it's a thought for the future. This eyepiece is a keeper for me. It is a shame this eyepiece is not parfocal with the 20mm, as being able to use the GSO Super View 20mm without changing the focus. Also this GSO eyepiece doesn't seem to be very heavy since it is so much bigger - actually it is not much heavier than my 32mm Televue plossl. Nice feature.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No
    42. mhuston6

      mhuston6 New Member

      Skill Level
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      User Notes:
      1184414640
      Jul 14, 2007

      4.0 GSO SuperView 30mm

      Pros:

      I like the views it shows, the price, the bolt case and the larger lens.

      Cons:

      Edge distortion and loss of contrast on bright objects.

      Comments:

      I have been using this 2" 30mm eyepiece for several nights in my C8 f/10 SCT and I have seen pretty good views through this. Specifications indicate this as a 68 degree eyepiece. But it is kind of strange that when I use this 2" 30mm in my SCT with a 2" visual back and then compare the view to a 1.25" 32mm which has a FOV of 44 degrees, the image is the same! I see the same stars in the view with either eyepiece.

      I viewed Jupiter through this until it drifted out of the eyepiece and it does show some edge distortion on bright objects, but this Superview seems to be a very nice accessory for me and works great with my C8, especially when you are on a tight budget like I am.

      I can't compare this to fancy $200 eyepieces because I just wouldn't personally spend that much for one. I don't know all the fancy mumbo-jumbo technicalities about how these are made, but it has made my viewing much better. It comes with a smooth action bolt case and both end caps.

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

      wrose New Member

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      1177366020
      Apr 23, 2007

      4.0 Best Buy for the Money

      Pros:

      Excellent finder EP, well built, and great $$ vs Value

      Cons:

      Edge Aberration especially in fast scopes

      Comments:

      One of the best buys for the money I've found lately. My initial findings compare similarly to those of the other reviewers. It is the best overall wide angle eyepiece in it's price range I've found. Unlike some others it's build using standard materials and has a metal barrel so it just 'feels better' than some of the plastic eyepieces being sold in this price range. There are a few of these others that have equal optics but the overall construction of this eyepiece put's it a definite notch above them.

      I was looking for a decent 'finder eyepiece' for use with my DOB at Public Star Parties that I wouldn’t have to worry too much about. I was using another brand 28mm Wide Angle (see picture) but was hoping to find something with a little wider FOV and maybe a little less aberration. Agena Products sent me this eyepiece and it has been great. The light transmission, contrast, and detail in the central 2/3's of the FOV blows the 28mm I was using away. While there's definite aberration in the outer 25% in my f/5.6 DOB, this eyepiece is far better than the vast majority of similar focal length wide angle EPs that costs less than $100.00.

      Out of curiosity I've tried this eyepiece in my C9.25 SCT and was pleasantly surprised. It certainly will not compete with high priced eyepieces but definitely holds it's own against any other 30mm wide field that costs twice as much. In the slower C9.25 this eyepiece has far less edge issues and is a very nice "knock around" wide field for use as a finder and generally scanning around. I can recommend this eyepiece to anyone looking for a wide field, 2" eyepiece for under $100.00

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

      melonman New Member

      Skill Level
      Unknown
      Time with Product
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      User Notes:
      1167346800
      Dec 28, 2006

      4.0 Another review of the 30mm Superview eyepiece.

      Pros:

      Decent at f/5, probably real good at f/7. Good finder eyepiece

      Cons:

      Aberration in fast scopes 1/3 from the edge

      Comments:

      Just wanted to add that the other review of this eyepiece is almost exactly the same as my own. The 30 mm does a little better on my 8" F/6 dob than in my F/5. It makes a good finder eyepiece and gives decent views to the edge with stars of low magnitude. But brighter stars flare in the outer 25% of the FOV. That being said, when I purchased mine for $57 with shipping from Agena AstroProducts I could find no other "finder" eyepiece of this quality for less. I might add, that for an older person, you supposedly will see no increase in the surface brightness of objects in any eyepiece beyond 30mm at F/5 (eyepiece mm/focal ratio of scope) (30/5) because our eyes only open to about 6mm. That means you could use the 42mm in an f/6 and probably get a bigger total FOV.

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

      Wolf359 New Member

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      1166396400
      Dec 17, 2006

      4.0 The Definition of "Bang for Buck"

      Pros:

      Lightweight, nice eye relief, good build quality, and an excellent price to performance ratio.

      Cons:

      Poor edge performance in fast scopes.

      Comments:

      I actually got this eyepiece free with a scope purchase and was a bit surprised at its performance. No, it couldn't compete with my premium eyepieces costing 6 times as much, but when you consider that these eyepieces sell for little more than an ordinary plossl, their value is very impressive. In my f5 Dobsonian, the SuperView was sharp out to about 2/3rd's of the field. Stars were noticeably distorted beyond that. However, the sharp portion of the field is about equivalent to that of a standard plossl while the extra remaining field definitely adds to the immersive experience. Eye relief was very good as well and the eyepiece was very light compared to other widefields I've used of similar focal lengths. I would definitely recommend this eyepiece to someone who wants a widefield eyepiece but doesn't want to spend the big bucks.

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

      Apparent Field of View 68°
      Barrel Size 2" (50.8mm)
      Bolt Case Included Yes - Free Agena Eyepiece Container
      Bolt Case Size Agena 65x120mm
      Coatings Fully Multi-Coated
      Height (with Eye Guard) 127mm
      End Caps 2
      Eye Relief by Design 22mm
      Filter Threads Standard 2" Filter Thread (M48 x 0.75)
      Focal Length 30mm
      Lens Elements 5
      Lens Groups 3
      Rubber Eye Guard Yes
      Blackened Lens Edges Yes
      Manufacturer GSO
      Eyepiece Focal Length 20.1mm - 30mm
      Eyepiece Field of View 61 - 70 degrees
      Eyepiece Series GSO SuperView
      Barrel Type Smooth sided
      Eyepiece Weight 12.90oz (365.71g)