MIR-20M 20 mm f/3.5 M42 ultra-wide-angle fast lens CZ Flektogon copy

Ultra-wide-angle MIR-20M 20mm f/3.5 fast lens

Carl Zeiss Flektogon copy

Mir-20 20mm f/3.5 is an interchangeable ultra-wide-angle fast lens. 

Old version: no MC coating.
New version: with MC coating.

The basis of the optical scheme of the Mir-20 lens was borrowed from the Carl Zeiss Jena Flektogon 20 mm f/2.8 lens. Some changes have been made to the scheme. 

Very good condition. Minor scratches or coating damage possible.The lens produces a sharp image, especially in the central region, already from aperture 3.5, from aperture 5.6 it is very sharp. The drop in resolution at the edges of the frame is quite noticeable.

The Mir-20 20mm f/3.5 has almost no geometrical distortions.

Color reproduction is bright and saturated. Slightly shifted to the area of ​​warm tones.

The Mir-20 lens is perfect for shooting landscapes, interiors, architecture, genre and reportage. Fits well on modern digital SLR cameras. When set to hyperfocal distance, you can forget about autofocus and shoot very quickly.

Mir-20 20mm f/3.5 lens features

96° diagonal field of view

Resolution (0/10/20mm)1): 50/35/30 lines/mm

Specification resolution (center/edge): 50/20 lines/mm

Light transmission coefficient: Mir-20M - 0.75; MC Mir-20M - 0.90

Color formula: Mir-20M - 11-0-2; MC Mir-20M -- 11-0-0

Geometric Vignetting: 40%

Lens length with caps: Mir-20M - 68 mm; 

The largest frame diameter: Mir-20M - 92 mm; 

Format: 35mm mirror SLR/DSLR

Type: Fixed focal length (fixed)

Focus: Manual focus

System: M42, Nikon F (FX, DX), Pentax K

Year of production start: 1973

End of production year: 1996

Optical design: 9 elements in 8 groups

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