Parabolic Mirror Newtonian reflection astronomical telescope Dai.130 F520

Specification

133mm caliber,

Focal length: 520mm,

The thickness of the main mirror about 18mm,

Weighs about 800 grams

Note: Purely hand-ground.

There will inevitably be mirror flaws.

Common problems include slight scratches on the coating, which are guaranteed not to affect normal observation. If you are concerned, please do not purchase.

The coating can be used for 8-10 years under moisture-proof storage. The parabolic surface accuracy is better than 1/10 wavelength. There is a central triangle mark on the front and an autograph on the back. There is no quality problem, no return or exchange after sale.