High Precision D130F530 Parabolic Surface Reflector Primary Mirror Used For DIY Newtonian Reflection Telescope Glass Material
D130F530 hand-ground high-precision parabolic mirror lens, 133mm diameter, 530mm focal length, focal ratio 4, aluminized film and silicon dioxide protective film.
Note: Hand-grinding will inevitably have minor flaws. A common problem is a small amount of scratches on the coating, which are guaranteed not to affect the normal observation. If you mind, don't buy it.
The coating can be used for 8-10 years under moisture-proof storage. The accuracy of the parabolic surface is better than 1/10 of the wavelength. There is a center triangle mark on the front and an autograph on the back.
Domestic enthusiasts photographed with D130F530 lenses
