SharpStar SCA260 Aspherical Cassegrain Astrograph (SCA260) Cleaning In the 1970s

In the 1970s

the allowable range of L is from 10 N·m / (2 × 10 m/s2) = 0

especially those caused by streetlight and most importantly their scattered light which lightens up the night sky

The diameter of balance shaft is 20mm

Combine this large image circle with a focal length of just 620mm and you have an instrument suitable for wide-field imaging

SharpStar SCA260 Aspherical Cassegrain Astrograph (SCA260) Cleaning In the 1970sThe launch of Sharpstar SCA260, a fast focal ratio aspherical Cassegrain astrograph, fills up the existing service gap in domestic market. SCA260 is designed with an aspherical mirror which entails much more sophisticated research and development. The process of producing, manufacturing and testing is more complicated compared with that of an ordinary reflective mirror. The telescope is wrapped with durable carbon fiber material, artistically