Accessory · MSRP $79
Stellarvue 90-Degree Erecting Prism with Focuser D1027A
Key specifications
| Accessory type | Other |
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All specifications
| Interface | 1.25" insert tube, threaded for filters |
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About
A 1.25-inch 90-degree correct-image erecting prism, the same one Stellarvue fits to its finder scopes, with a rubber-gripped helical focuser giving about 0.6 inches of travel. That makes it a way to focus finely on telescopes that suffer image shift while keeping the view right side up and correctly oriented. The prism is fully multi-coated for better than 99 percent transmission, giving higher contrast and brighter stars than MgF2-coated prisms, and the side plates are carbon fibre.