@valo 3 March 2023 more from that month

Rubinar 500mm f/5.6 - "macro" mode use Some time ago, I wrote about one of my lenses, the MTO 500mm f/8, a nice mirror lens that I bought several years ago. I made a basic schematic and explained a bit about how the lens works and how it differs from traditional constructions. Today I am continuing the story about this interesting construction, telling about the MTO's cousin, the Rubinar 500mm f/5.6... Read more on my Hive account https://ecency.com/hive-194913/@taimen/rubinar-500mm-f-5-6