(SOLD) Celestron Multi-Function Focal Tester
Please Log In to view the details for this classified ad.
Don't have an Astromart account? Click here to create one
This is a focusing aid designed to allow astrophotographers to accurately evaluate their telescopes focal plane in three main areas: focus, collimation, and curvature of field. The glass plate is positioned at 55mm, the exact distance from the front surface of the T-ring to a SLR film plane. Can be used with the Celestron Radial Guider to achieve precise focus. Excellent condition. Shown upsidedown to show the opaque and reflective coatings. $85.00 shipped in USA. Thanks. Harvey Herman.
Funding Member
