Secondary Mirror Short Axis for DIY Reflection Astronomical Telescopes (20-70mm Options Available)(65mm)

Versatile short axis secondary mirrors available in sizes from 20mm to 70mm, perfect for custom Newtonian telescopes. The glass with an aluminium coated surface and a protective film ensures durability and optimal light reflection. Compatible with various main aperture reflectors including 76mm, 114mm, 127mm, 150mm and 203mm, for enhanced viewing experiences. Ideal for DIY enthusiasts wanting to upgrade or build their own reflective astronomical telescopes with precision. Easy to install and customize, making it a must-have accessory for amateur astronomers and telescope builders.