ZWO Darkening Ring Set for EFW & APS-C or Full Frame ASI Cameras* - DR-D88 Admin - Sales Statement - In Title Focal Ratio: f/6

Focal Ratio: f/6

00″ 190mm\7

25” diagonal produces right side up and left-to-right correct images when used with refractors and catadioptric (Schmidt-Cassegrain) telescopes

50 degree apparent field (6/10/18mm Ortho): Makes finding and centering objects at high powers easier than typical 40-45 deg eyepieces

This triplet reducer is specifically designed for the Askar FRA400C

ZWO Darkening Ring Set for EFW & APS-C or Full Frame ASI Cameras* - DR-D88 Admin - Sales Statement - In Title Focal Ratio: f/6The D88 Darkening Ring Set will help solve any possible light leak issue occurring in the gap between EFW 2" or 36 mm seven position filter wheels and all ASI APS C or Full Frame cameras *except the ASI461MM P, which uses the ZWO D90 Darkening Ring Set. The D88 set includes four (4) rings. All have an external diameter of 88 mm and are approximately 0. 2 mm thick. Two have an inside diameter of 55 mm and two have an inside diameter of 58 mm. The 55 mm