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GSO Elliptical Secondary Mirror - 50mm

4.8 (4 Reviews) Read Reviews Write Review
Brand GSO
Part Number AD007
Availability available

Product Info

Manufacturer Description

For years, GSO has made dobsonian telescopes sold under various labels. Users of these scopes know the excellent quality of the optics included, and they have a well-deserved reputation for being the finest mirrors in their price range. We are now pleased to offer virtually the entire line of GSO's Newtonian optics in the US market.

GSO's elliptical flat mirrors have the same high quality as their parabolic primary mirrors. Made from optical grade BK-7 glass, all mirrors have a reflective aluminum coating with a reflectivity of approximately 92-93%. The aluminum coating is protected by a silicon oxide (SiO2) over-coating.

GSO uses high-volume, state-of-the-art, high quality manufacturing and test lines. GSO guarantees diffraction limited performance, but their secondary mirrors typically have a mirror surface quality of 1/12 wave RMS at least, and often better. This very smooth mirror surface results in excellent optical performance with practically no light scatter.

Besides elliptical secondary flats, we also offer matching GSO parabolic primary mirrors, mirror cells, and spiders (all sold separately).

Reviews

4.8 (Based on 4 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      User Notes:
      Review by MARIO G.
      1550442443
      Feb 17, 2019

      4.0 Very good

      Pros:

      Cons:

      Comments:

      Very good

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

      This review was provided courtesy of AgenaAstro.com

    2. Scopejunkie

      Scopejunkie Well-Known Member

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      User Notes:
      Review by Keith L.
      1529517855
      Jun 20, 2018

      5.0 Good Glass

      Pros:

      Cons:

      Comments:

      Arrived promptly. Well packed. Works great!

      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.
      1484138268
      Jan 11, 2017

      5.0 As advertised

      Pros:

      Cons:

      Comments:

      I purchased a 2"secondary mirror. It appears to be perfect. Well packaged and fast shipping. Very satisfied with the transaction.

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

      This review was provided courtesy of AgenaAstro.com

    4. Guest

      Skill Level
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      User Notes:
      Review by lagarmon of Zaragoza, Spain.
      1363996800
      Mar 22, 2013

      5.0 Good product and fast delivery

      Pros:

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

      Cons:

      Comments:

      I need it to change the focal distance of a newtonian telescope. I'm happy with the secondary mirror.

      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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