D76F700 astronomical telescope 76700 reflective objective lens set 20mm short shaft auxiliary mirrorDIY homemade telescope lens

D76F700 reflective objective lens set, diameter 76mm, focal length 700mm, aluminized and protective film.

It is suitable for installing 76mm diameter Newton reflecting telescope. The short axis of the auxiliary mirror is about 19mm and the long axis is about 27mm. With tapping hole at the bottom of the lens base, the inner diameter is about 4.3mm

Celestron 4mm eyepiece, 1.25 inch (31.7mm interface)

 

Celestron 10mm eyepiece, 1.25 inch (31.7mm interface)

ABS plastic material, with a total length of 160mm and an effective extension of 65mm. Three screw holes are reserved in the installation part, which is suitable for Newton reflector telescopes with a diameter of less than 150.

Small instructions for cleaning the mirror surface: First use blowing balloons to blow off the dust that can be blown away, then use degreasing cotton of good quality to touch some alcohol and then gently wipe the mirror surface, after drying, look at the light source from the side to see if there are some cotton silk or water stains left on it. If there is, wipe it gently with some good quality glasses wiping cloth (be careful, otherwise it will affect your telescope)。