GSO Elliptical Secondary Mirror - 50mm
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
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.
Specifications:
- Manufacturer part #: AD007
- Minor axis diameter: 50mm
- Approx. major axis diameter: 70mm
- Approx. thickness: 10mm
- Weight: 2.3oz (65g)
Useful Resources
| Specifications of GSO Secondary Mirrors | ||||
|---|---|---|---|---|
| Part Number | Minor Axis Diameter | Approx. Major Axis Diameter | Approx. Thickness | Mirror 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) |
Other Information
- Country of Manufacture: Taiwan
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.
Specifications:
- Manufacturer part #: AD007
- Minor axis diameter: 50mm
- Approx. major axis diameter: 70mm
- Approx. thickness: 10mm
- Weight: 2.3oz (65g)
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.
Specifications:
- Manufacturer part #: AD007
- Minor axis diameter: 50mm
- Approx. major axis diameter: 70mm
- Approx. thickness: 10mm
- Weight: 2.3oz (65g)
Useful Resources
| Specifications of GSO Secondary Mirrors | ||||
|---|---|---|---|---|
| Part Number | Minor Axis Diameter | Approx. Major Axis Diameter | Approx. Thickness | Mirror 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) |
Other Information
- Country of Manufacture: Taiwan
GSO Elliptical Secondary Mirror - 50mm