Kutter telescope with toroid primary, building log
Guntram Lampert 🇺🇦 on Twitter: "Jupiter, photographed with my homemade 110mm f/26 Kutter telescope. No ADC was used. Thisi instrument serves primarily for observing and sometimes photographing the Sun. https://t.co/XmELklplzW" / Twitter
Who built a unobstructed telescope...? - ATM, Optics and DIY Forum - Cloudy Nights