GSO Elliptical Secondary Mirror - 62.5mm

Our Price: $60.00
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In Stock (3 Available)
Ships by Next Business Day
Our Product ID: PATM-GS-E62.5
Manufacturer SKU: AD047
Item Can Ship: Worldwide
GSO Elliptical Secondary Mirror - 62.5mm

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Product Details

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).


  • Manufacturer part #: AD047
  • Minor axis diameter: 62.5mm
  • Approx. major axis diameter: 88mm
  • Approx. thickness: 12mm
  • Weight: 4.5oz (128g)

Useful Resources

Specifications of GSO Secondary Mirrors
Part NumberMinor Axis DiameterApprox. Major Axis DiameterApprox. ThicknessMirror Weight
AD041 28mm 38mm 5mm 0.3oz (9g)
AD012 31mm 43mm 8mm 0.7oz (20g)
AD064 46.5mm 65mm 10mm 2.1oz (60g)
AD007 50mm 70mm 10mm 2.3oz (65g)
AD047 62.5mm 88mm 12mm 4.5oz (128g)
AD091 68mm 95mm 15mm 6.7oz (190g)
AD009 70mm 97mm 12mm 5.5oz (156g)
AD092 74mm 104mm 16mm 8.2oz (232g)
AD093 80mm 114mm 18mm 11.5oz (326g)
AD037 88mm 122mm 20mm 14.5oz (411g)
AD018 104mm 145mm 17mm 18.2oz (515g)