MTO-1000, 1000/10 Mirror Lens, M42 or 39mm, Early

Description

The Russian MTO-1000 is a truly magnificent sample of the Soviet-era engineering and workmanship. It is an extreme telephoto mirror lens based  on the design of a known Soviet engineer Maksutov.

“MTO” stands for “Maksutov’s Tele Ob’ektiv”. This is original, early MTO-1000, the largest and heaviest lens made in the USSR. Later versions of this lens were much lighter and somewhat smaller, they came is vinyl cases, but this MTO-1000 weighs 3.9 kg (8.6 lbs!) and comes in an instrument-type wooden case.