विलियम ओप्टिक्स FLT91 अपोक्रोमेटिक रिफ्रेक्टर फ्लोरोस्टार निर्देश पुस्तिका
FLUORO STAR 91 MANUAL WILLIAM0PTICS.C0M/FLU0R0STAR-91 FLT91 Apochromatic Refractor Fluorostar Warning Never aim your telescope or finder scope at the Sun without proper Solar filters installed on the front of the telescope. Doing so for even a moment may permanently damage…