TOZ-500 500 mm f/ 3.5 Lens

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Format: 35mm SLR

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: M39

First year of production: 1960

Optical design: 2 elements in 2 groups

Features: Mirror lens

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Specifications:

Focal length	Max. aperture	Min. aperture	Blades	Min. Focus (m.)	Filter Ø (mm.)	Weight (gr/oz)	Length (mm/in)
500mm	f/3.5		no			8000/282,2

Additional information:

The TOZ-500 500 mm f/ 3.5 (Russian: "ТОЗ") is a fast telephoto mirror aspherical coated lens for 35 mm SLR cameras with the M39 screw mount.

TOZ stands for Telephoto Mirror Lens.

The TOZ-500 employs the optical schemes designed by Cassegrain and Ritchey-Chrétien.

The use of aspherical elements (primary mirrors are concave paraboloids or hyperboloids, secondary mirrors are convex hyperboloids, manufactured by means of vacuum aspherization) makes it possible to fundamentally increase lens speed, though it has affected the lens size.

The pilot models of the TOZ-500 500 mm f/ 3.5 were manufactured in the early 1960's at the KMZ.

Angle of View: 5°
Aperture: fixed
Filters: built-in ring mount, 4 pcs
Resolution (center/edge): approx. 40/25 lpmm

Links to online resources:

Review of the lens TOZ-500 500 / 3.5 on photohistory.ru (Russian)

Posted by: dobrun Date of publication: 08.07.2011

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