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).
Sep 1, 2018
Great product & servicePros: Cons: Comments:
Product was exactly as described and arrived fast and in perfect condition. Extremely well packaged! Thanks to Agenda support for going above and beyond to find the exact replacement that I needed for my Lightbridge! Will definitely use them again for future purchases. A+. 10/10
This review was provided courtesy of AgenaAstro.comDec 24, 2016
Drop in replacementPros: Cons: Comments:
My original secondary mirror had some coating issues so I ordered a new one for my 12" lightbridge. This mirror arrived in perfect condition, was a drop in replacement and gives great views.
This review was provided courtesy of AgenaAstro.comSort by