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

Description

The Russian MTO-1000 is a truly magnificent sample of 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.

Lens Specifications:

• Focal length  1000 mm
• Aperture  1:10 (fixed, this design does not allow for variable aperture)
• Field of coverage  2.5 deg (because of such narrow angle, the lens is quite hard to point to the right object, so it is equipped with an iron sight)
• Focusing  10 m- infinity (the lenses of this design may focus past infinity, this is done to compensate for thermal expansion)
• Filter size  M120x0.5
• Optical registration (back focus)  45.2+/- 0.02 mm
• Mount  M39x1 Zenit SLR Mount, M39 to M42 Adapter is included, this lens can be used with any M42 camera body.
• Dimensions  Max diameter: 158mm (6.4″), Length: 260mm (10.6″)
• Weight  3.9 kg (8.6 lbs) without case
• The glass is coated; the barrel is finished in tough black enamel

This MTO-100 was made in 1960. It is in EXC- condition, the barrel shows little use, just a few paint scuffs. The glass is clear and clean.
The focusing is smooth. You will need a sturdy tripod to shoot with this lens.

Included:

• MTO-1000 Lens
• Front Cap (metal)
• Lens Shade (metal)
• Wooden Case

The lens is shown mounted on a Zenit camera (not included). (In this case it is the camera that is mounted on a lens). This MTO-1000 can be used with  any 39 mm mount Zenit (models Zenit, Zenit-S, Zenit-3, Kristall, Zenit-3M, early Zenit-E). With a 39/42 mm adapter (included) the lens can be used with all M42 mount cameras.