MTO-500, 500/8 Mirror Lens, M39 or M42 Mount

The Russian MTO-500 is a classic sample of Soviet-era engineering and workmanship. It is a 500 mm telephoto mirror lens based on the design of a known Soviet engineer Maksutov. "MTO" stands for "Maksutov's Tele Ob'ektiv". This is the original, early MTO-500 design, with the barrel made of brass. Later versions of this lens were much lighter and somewhat smaller, they came is vinyl cases, but this MTO-500 weighs 1.5 kg (3.3 lbs) and comes in an instrument-type wooden case.

Lens' Specifications

  • Focal length

500 mm

  • Aperture

1:8 (fixed, this design does not allow for variable aperture)

  • Field of coverage


  • Focusing

4 m - Infinity (the lenses of this design may focus past infinity, I was told this is to compensate for thermal expansion)

  • Filter size

M77x0.75 (4 filters are included)

  • Optical registration (back focus)

45.2? 0.02 mm

  • Mount

M39x1 Zenit SLR Mount (can be used with all M42 SLRs with the included adapter)

  • Dimensions

Max diameter: 100mm (4"), Length: 165mm (6.5")

  • Weight

1.5 kg (3.3 lbs) without case

  • The glass is coated; the barrel is finished in tough black enamel

This MTO-500 was made in 1966. It is in excellent condition, the barrel shows very little (if any) use. The glass is clear and clean. The focusing is smooth.

You will need a sturdy tripod to shoot with this lens.


  • MTO-500 Lens
  • Four filters (Light Yellow/Green, Orange, Red, 4x Neutral Grey)
  • Wooden Case

The lens is shown mounted on a Zenit (not included). This MTO-500 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 in this set) the lens can be used with M42 cameras.

2 x Helios-40, 85/1.5, M39 Zenit Mount
1 x Camera Cases - Please Inquire
1 x Kiev-4m, 4am Case
1 x Cable Release, 10", Germany
1 x Sony Nex to 39mm (LTM) Adapter
1 x Start Waist Level Finder
1 x Zenit-4, 5, 6 Prism Finder
1 x 39mm Rear Lens Cap, Leica Thread Mount, Metal, Tall
1 x Shutter Ribbon, Original Arsenal Part
1 x Filter Skylight 1A, 49mm, Bower, Black Ring, Japan
1 x Filter Yellow 2x, 36mm, Russian
1 x Filter UV, 40.5mm, Bower, Chrome Ring, Japan
1 x Filter Polarizing, 49mm, Chrome Ring, Japan
1 x Filter ND4, 40.5mm, Bower, Black Ring, Japan
1 x Filter, Special Effect Mirage 3R, 40.5mm, Japan
1 x FED-3, type a with Jupiter-8
1 x Zarya
1 x Lenscap, 36 mm, for Industar-22, -50, FED
1 x Shutter Release Button Attachment, Small Chrome
1 x Filter Polarizing, 40.5mm, Chrome Ring, Japan
1 x Lens Hood, 40.5mm, Metal, Vented, Straight
1 x Jupiter-8, 50/2 Chrome
1 x LOMO Compact LC-A
1 x Russar MR-2, 20/5.6 with 20 mm Finder
1 x Jupiter-3, 50/1.5 Black, Passport, EXC+
1 x Jupiter-12, 35/2.8 Chrome, Passport
1 x Zenit, First Model
1 x ZM-6A 500/f:6.3 Mirror Lens, M42 Mount
1 x Zenit-3 with Helios-44
1 x Helios-44, Classic 58/2 Lens
2 x MTO-500, 500/8 Mirror Lens, M39 or M42 Mount
1 x Zenit-S
1 x Jupiter-6, 180/2.8, M39 Zenit Mount
2 x Industar-22, Zenit Mount, Rare
1 x FED-4 Type a with Industar-26m
1 x FED-2 Body
1 x FED-3, type b
1 x FED-2, Green, Uncommon
1 x Zorki Stereo Attachment, Complete, Rare
1 x Jupiter-11, 135/4
1 x Finder 85 mm
1 x Jupiter-3, 50/1.5 Chrome
1 x Finder Universal, 28-135 mm, Early "Reversed"
1 x Leningrad, Leica Mount RF, Uncommon, Box and Passport
1 x Start Extension Ring
1 x Start Adapter for 39 mm SLR Lenses
1 x Smena-8M, LOMO, New
1 x Industar-61 LZ, M42 Mount
1 x Jupiter-11, 135/4, SLR Mount
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