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GSO 1.25" Plossl Eyepiece - 15mm

4.2 (10 Reviews) Read Reviews Write Review
Brand GSO
Part Number GSP15
Availability available

Product Info

Manufacturer Description

GSO's Super-Plossl eyepieces have been some of our most popular sellers over the years. Users will experience incredible views without breaking the bank or impinging on your telescope's balance. They represent what is perhaps the best buy today for astronomers on a budget or for beginners. But don't be fooled by their low prices - these might well turn out to be all the eyepieces you will ever need!

The GSO Super-Plossls are available in a 1.25" barrel size and 9 different focal lengths ranging from 4mm to 40mm. The 4mm, 6mm and 9mm models are great for high power planetary and lunar observation.  The 12mm and 15mm are perfect intermediate focal lengths, performing well on both deep-sky and planetary subjects.  The 20mm and 25mm models would be excellent choices for low power scanning of open star clusters and viewing larger galaxies. The 32mm and 40mm models offer a wide field and are superb for wide field scanning, detailed observations of large diffuse subjects or as a finder eyepiece.

Features:
- All eyepieces are fully multicoated (FMC) for maximum light transmission
- High quality lenses provide the best-possible sharpness all over the field of view
- Blackened lens edges reduce light scattering and improve contrast
- Fold-down rubber eyecups to keep out stray light
- Comfortable eye relief at all but the shortest focal lengths (As in all Plossl eyepieces, eye relief can get tight at the shorter focal lengths but this is design constraint, not a fault of these eyepieces)
- Includes two end caps

Reviews

4.2 (Based on 10 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      User Notes:
      Review by Sixfalls
      1530589500
      Jul 2, 2018

      5.0 A.W.

      Pros:

      Cons:

      Comments:

      I like this EP better than some I own, that cost much more. Especially if your scope is f8 or slower, its hard to find a sharper, crisper image. I use mine on an Orion XT6, 6" f/8.

      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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      User Notes:
      Review by Mike of Romney WV.
      1457740800
      Mar 11, 2016

      5.0 Star viewing at its best

      Pros:

      Accurate,Quality Lenses

      Cons:

      Comments:

      Eyepiece used with 12" Dobsonian. Well finished, excellent optics, crisp view. Great product thanks MCA

      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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      User Notes:
      Review by RJ of Australia.
      1306972800
      Jun 1, 2011

      4.0 Excellent for the budget conscious.

      Pros:

      Accurate,Strong Construction,Quality Lenses

      Cons:

      None

      Comments:

      I bought a couple GSO eyepieces to complete a set. I am a novice when it comes to Astronomy, but I can say that these eyepieces and Agena Astro came highly recommended. I was able to focus on targets easily and the view was very clear. If you are on a budget but want quality I can easily recommend this and other GSO eyepieces.

      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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      User Notes:
      Review by Dave of Tenino, WA.
      1306627200
      May 28, 2011

      4.0 Don't let low cost fool you

      Pros:

      Compact,Accurate,Strong Construction,Quality Lenses

      Cons:

      Comments:

      You know the old saying "you get what you pay for" well in this case you get more. GSO plossl eyepieces are as good as any on the market only cheaper. I will buy from Agena Astro again in the future.

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

      This review was provided courtesy of AgenaAstro.com

    5. kkrepps

      kkrepps New Member

      Skill Level
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      User Notes:
      Review by K. Krepps of Connecticut.
      1233619200
      Feb 2, 2009

      5.0 Best Inexpensive plossl

      Pros:

      Good construction,Low price,High Contrast

      Cons:

      None

      Comments:

      This is the best value in plossl eyepieces that I've found. They come with a nice bolt case and have full multi-coatings. Eye relief is good for the 15mm. I use this one for my PST and it gives very sharp images of solar prominences and granulation. These are a slight step above the Orion Sirius and Celestron plossls that I've used, and at 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

    6. kkrepps

      kkrepps New Member

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      1233115080
      Jan 27, 2009

      5.0 Best Inexpensive plossl

      Pros:

      High Contrast; Good Construction; Low Price; Free Bolt Case.

      Cons:

      None.

      Comments:

      This is the best value in plossl eyepieces that I've found. They come with a nice bolt case and have full multi-coatings. Eye relief is good for the 15mm. I use this one for my PST and it gives very sharp images of solar prominences and granulation. These are a slight step above the Orion Sirius and Celestron plossls that I've used, and at a better price!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No
    7. AstroGuy1

      AstroGuy1 New Member

      Skill Level
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      User Notes:
      Review by jeepizoid of Arizona.
      1228176000
      Dec 1, 2008

      4.0 Great eyepiece for the money!

      Pros:

      Fully multi-coated,Decent eye relief,Blackened lens edges

      Cons:

      None

      Comments:

      The 15mm GSO Super plossl is a good medium power eyepiece with nice sharp views. I have 2 Orion Sirius plossl EPs, the 10 and the 25mm and I can tell you that the GSO Super Plossl EPs are a step above them. The GSOs are fully multi-coated with blackened edges also with security recess barrels. Being a machinist I can say that the diameters of the barrels are machined with close tolerances and fit my diagonal with a feel of quality. As for eye relief the GSOs have more than either the Sirius or the Highlights on any given eyepiece ... my 15mm GSO has as much eye relief as the 20mm Orion Highlight and my 4mm GSO has more than the 7.5mm Orion highlight. Oh yeah, let's not forget the price so maybe just try one.

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

      This review was provided courtesy of AgenaAstro.com

    8. AstroGuy1

      AstroGuy1 New Member

      Skill Level
      Unknown
      Time with Product
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      User Notes:
      Review by epee of Georgia.
      1227052800
      Nov 18, 2008

      3.0 Good, solid eyepiece at very fair price

      Pros:

      Good quality

      Cons:

      None

      Comments:

      This is a great plossl for the money, virtually the same as the Orion Sirius plossls. Bright and clear with decent eye-relief, a flat field and good correction to the edge of the field. This is why plossls are the standard eyepiece of today. If you like the eyepieces that came with your Orion scope this is a great way to round out your collection.

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

      This review was provided courtesy of AgenaAstro.com

    9. jeepizoid

      jeepizoid New Member

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      1205975760
      Mar 19, 2008

      4.0 Great eyepiece for the money!

      Pros:

      Fully multi-coated, blackened lens edges, decent eye relief for a plossl

      Cons:

      None

      Comments:

      The 15mm GSO Super plossl is a good medium power eyepiece with nice sharp views. I have 2 Orion Sirus plossl EPs, the 10 and the 25mm and I can tell you that the GSO Super Plossl EPs are a step above them. The GSOs are fully multi-coated with blackened edges also with security recess barrels. Being a machinist I can say that the diameters of the barrels are machined with close tolerances and fit my diagonal with a feel of quality. As for eye relief the GSOs have more than either the Sirus or the Highlights on any given eyepiece ... my 15mm GSO has as much eye relief as the 20mm Orion Highlight and my 4mm GSO has more than the 7.5mm Orion highlight. Oh yeah, let's not forget the price and the free shipping so maybe just try one.

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

      epee New Member

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      1172245140
      Feb 23, 2007

      3.0 A good, solid eyepiece for a very fair price.

      Pros:

      Good quality, Good price

      Cons:

      None that are not specific to the plossl design

      Comments:

      This is a great plossl for the money, virtually the same as the Orion Sirius plossls. Bright and clear with decent eye-relief, a flat field and good correction to the edge of the field. This is why plossls are the standard eyepiece of today.

      If you like the eyepieces that came with your Orion scope this is a great way to round out your collection.

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

      Apparent Field of View 52°
      Barrel Size 1.25" (31.7mm)
      Bolt Case Included Yes - Free Agena Eyepiece Container
      Bolt Case Size Agena 42x60mm
      Coatings Fully Multi-Coated
      Design Plossl
      Height (with Eye Guard) 63mm
      End Caps 2
      Eye Relief by Design 13mm
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Focal Length 15mm
      Lens Elements 4
      Rubber Eye Guard Yes
      Blackened Lens Edges Yes
      Manufacturer GSO
      Eyepiece Focal Length 10.1mm - 15mm
      Eyepiece Field of View 51 - 60 degrees
      Eyepiece Series GSO Plossl
      Barrel Type Smooth sided
      Eyepiece Weight 3.10oz (87.88g)