ZM-6A 500/f:6.3 Mirror Lens, M42 Mount


ZM-6A 500/f:6.3 Mirror Lens, M42 Mount

SKU: zm6a912294 Category:


The Russian ZM-6A 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. This lens succeeded the original MTO-500 lens,
which was a heavy, brass unit. “MTO” stands for “Maksutov’s Tele Ob’ektiv”. ZM stands for Zerkal’nyi (Mirror) Maksutov’s. The ZM-6A was much improved, it is a faster lens (1:6.3 vs. 1:8 in the MTO-500). It is also lighter, with multi-coated glass, and has a built-in sliding lens hood.

Lens’ Specifications

  • Focal length

500 mm

  • Aperture

1:6.3 (fixed, this design does not allow for variable aperture)

  • Field of coverage
5 deg
  • Focusing
6m – Infinity (the lenses of this design may focus past infinity, this is done to compensate for thermal expansion)
  • Filter size
M95x1 (4 filters are included)
  • Optical registration (back focus)
45.2 +/- 0.02 mm
  • Mount
  • Dimensions
Max diameter: 100mm (4″), Length: 165mm (6.5″)
  • The glass is coated; the barrel is finished in tough black enamel

This ZM-6A was made in 1991. It is in mint condition,looks unused. The glass is clear and clean. The focusing is smooth.

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

The set includes:

  • ZM-6A Lens with buil-in lens shade.
  • Four filters (Yellow/Green 5.6x, Orange 4x, UV 1.4x, Neutral Density 4x)
  • Metal front screw-in lenscap and plastic rear lenscap.
  • Vinyl Case

The lens is shown mounted on a Zenit 12xp (not included). This ZM-6A can be used with any M42 camera.


Additional information

Weight 6 lbs


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