Baader Planetarium C-Mount Extension-Ring 1" C(i) / T-2(a) | 2958521 GEM45 Detachable drive block assembly is

Detachable drive block assembly is reversible for right hand or left hand fine-focus operation and for attaching the Diamond Steeldrive motor block

Fits dew shields with an outside diameter of 175-212mm

Compared to the 61EDPHⅡ

Users basically don’t need to worry about the related issues any more with this five-in-one filter installation device

Fine-optically polished to ensure accurate 1/4 wavefront and < 30 seconds parallelism over the both surfaces

Baader Planetarium C-Mount Extension-Ring 1" C(i) / T-2(a) | 2958521 GEM45 Detachable drive block assembly isBaader C Mount Extension Ring 1" C(i) T 2(a) Specifications Manufacturer Baader Planetarium SKU (#) 2958521 EAN Code 4047825023933 Optical length (mm) 0 6 Camera Adaptable C Mount Inner Diameter Clear Aperture (mm) 24. 5 Outer Diameter 42 Outer Connection (lens sided) Thread, T 2 (M42 x 0. 75) Inner Connection (eyepiece camera sided) Thread, 1" (C Mount) Compatible Brands Astro T 2, Baader Planetarium, Celestron, Other Type of Adapter Camera Adapter,