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Contax 645 mount Standard prime

Contax Zeiss 55mm f/3.5 Distagon T*

Quick answer

The Contax Zeiss 55mm f/3.5 Distagon T* is a standard prime lens covering 55mm at f/3.5 for the Contax 645 mount. Its moderate maximum aperture works best in good light or with a higher ISO.

  • Full frame
  • APS-C (83mm equiv.)
  • Micro Four Thirds (110mm equiv.)
  • Other systems via mount adapter
Focal
55mm
Aperture
f/3.5–32
Weight
500g
Filter
72mm
Min focus
0.45m

What 55mm sees

Full frame crop 1.0×
42.9° 36.2° horizontal
APS-C crop 1.5× → 83mm
29.4° 24.6° horizontal
Micro Four Thirds crop 2.0× → 110mm
22.3° 18.6° horizontal

Diagonal angle of view. Frames drawn to scale at 55mm. Calculated from the focal length and crop factor (adapted mount, so sensor size depends on your camera), not measured.

Open the field-of-view calculator

Contax Zeiss 55mm f/3.5 Distagon T* specifications

Optics

Focal length
55mm
Maximum aperture
f/3.5
Minimum aperture
f/32
Format coverage
Medium format
Optical construction
7 elements in 7 groups

Focus

Minimum focus distance
0.45 m

Physical

Filter thread
72 mm
Weight
500 g
Length
75 mm
Diameter
81 mm

General

Brand
Contax
Mount
Contax 645
Lens type
Prime

Specification source: en.wikipedia.org

What can you shoot with the Contax Zeiss 55mm f/3.5 Distagon T*?

At 55mm this is a standard prime, which typically suits:

  • Everyday and street photography
  • Natural-perspective portraits
  • Documentary and travel work

Its moderate maximum aperture works best in good light or with a higher ISO.

Frequently asked questions

What mount does the Contax Zeiss 55mm f/3.5 Distagon T* use?

It uses the Contax 645 mount, so it fits Contax 645 cameras directly and can be used on other systems through a mount adapter.

What is the focal length of the Contax Zeiss 55mm f/3.5 Distagon T*?

It is a fixed 55mm lens with a maximum aperture of f/3.5. That makes it a standard lens.

Is the Contax Zeiss 55mm f/3.5 Distagon T* a prime or a zoom lens?

It is a prime lens with a fixed 55mm focal length. Primes usually open wider than zooms; this one opens to f/3.5.

What is the Contax Zeiss 55mm f/3.5 Distagon T* equivalent on a crop sensor?

On APS-C (1.5x crop) it frames like 83mm on full frame, with a 24.6° horizontal and 29.4° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 110mm on full frame, with a 18.6° horizontal and 22.3° diagonal field of view. These figures are calculated from the focal length and crop factor.