💫Product Name : Reflector Spherical Mirror Telescope Accessories Set.
💫Caliber: 160mm, Focal length: 1300mm
💫The main mirror material is K9 glass, spherical reflection concave mirror, focal ratio (focal length to aperture ratio) 8.12, the surface is coated with aluminum film and protective film.
💫The short axis of the secondary mirror is about 35mm, and the long axis is about 50mm.
💫 Coating : Optical lens, fully coated, high definition
💫 Application : Dual-use, suitable for all astronomical telescopes (31.7mm interface), for viewing scenery and astronomical observation of the lunar surface, planets, nebulae, star clusters, diffuse nebulae and other celestial bodies, high brightness, large field of view, observation is very comfortable; Metal body, full surface multilayer coating, excellent optical performance.
Description
Used:Cleaning the mirror surface: first blow off the dust that can be blown off with a blown balloon, then use a good quality absorbent cotton to dip the alcohol and gently wipe the mirror.
After drying, look at the light source from the side to see if there is some cotton or Keep the water stains on top, and if necessary, gently wipe them with some good quality mirror cloth (be careful, otherwise it will affect your telescope).