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Carl Zeiss Biogon T* 2,8/21 ZM

Leica M-Mount

Carl Zeiss Biogon T* 2,8/21 ZM

Focal length
21 mm
Aperture
f/2.8
Weight
300 g
Filter diameter
46 mm
Min. focus distance
50 cm
Length
64 mm
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At a Glance

This wide-angle prime has a 21 mm focal length and an f/2.8 maximum aperture. It fits Leica M mount and covers full frame. Focusing is manual, and the minimum focus distance is 50 cm. The wide field of view suits landscape and reportage work.

Good for

  • Landscape
  • Reportage

Worth knowing

  • No autofocus: focusing is manual only.

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

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Min. focal length
21 mm
Max. focal length
21 mm
Max. aperture (min. zoom)
f/2.8
Max. aperture (max. zoom)
f/2.8
Min. aperture
f/22
Elements
9
Groups
7
Weight
300 g (0.66 lb)
Filter diameter
46 mm
Min. focus distance
50 cm (19.69 in)
Max. magnification
1:20.8 (0.05×)
Length
64 mm (2.52 in)
Diameter
53 mm (2.09 in)

Manufacturer data: zeiss.com

Last checked: October 13, 2026 (against the manufacturer data) · How we check

Simulate depth of field and angle of view

Compare with other lenses

Which cameras does the Carl Zeiss Biogon T* 2,8/21 ZM fit?

The Carl Zeiss Biogon T* 2,8/21 ZM is a full-frame lens for Leica M-Mount cameras. On full-frame bodies it uses the whole sensor; on APS-C Leica M-Mount cameras its field of view equals 32 mm in full-frame terms.

Leica M-Mount cameras

Full frame:
Leica M EV1,Pixii Max,Leica M11-D,Leica M11-P,Leica M11 Monochrom,Leica M11,Leica M10-R,Leica M10 Monochrom,Leica M-E (Typ 240),Leica M10-P,Leica M10-D,Leica M10,Leica M-D (Typ 262),Leica M (Typ 262),Leica M Monochrom (Typ 246),Leica M Edition 60,Leica M-P (Typ 240),Leica M (Typ 240),Leica M-E (Typ 220),Leica M Monochrom (Typ 230),Leica M9-P,Leica M9
APS-C:
Pixii+ (A2572+),Pixii (A2572),Pixii (A1571),Pixii (A1112)

With the Leica M-Adapter L the lens can also be used on Leica L-Mount cameras.

Carl Zeiss Biogon T* 2,8/21 ZM compared

Key specs side by side with the most similar Leica M-Mount lenses.

LensCarl Zeiss Biogon T* 2,8/21 ZMLeica Elmarit-M 21mm f/2.8 ASPHLeica Super-Elmar-M 21mm f/3.4 ASPHThypoch Ksana 21mm F3.5
Focal length21 mm21 mm21 mm21 mm
Max. aperturef/2.8f/2.8f/3.4f/3.5
Weight300 g300 g279 g131 g
Filter diameter46 mm55 mm46 mm39 mm
Min. focus distance50 cm70 cm70 cm50 cm
Length64 mm46 mm43 mm27.3 mm
Autofocusnononono
Image stabilizationnononono
Open these lenses in the comparison and add more

Carl Zeiss Biogon T* 2,8/21 ZM: FAQ

Does the Carl Zeiss Biogon T* 2,8/21 ZM have autofocus?

No, the Carl Zeiss Biogon T* 2,8/21 ZM has no autofocus; you focus it manually.

Does the Carl Zeiss Biogon T* 2,8/21 ZM have image stabilization?

No, the Carl Zeiss Biogon T* 2,8/21 ZM has no stabilization of its own. On cameras with in-body image stabilization (IBIS) the image is still stabilized.

How much does the Carl Zeiss Biogon T* 2,8/21 ZM weigh?

The Carl Zeiss Biogon T* 2,8/21 ZM weighs 300 g. It is 64 mm long with a diameter of 53 mm.

What filter size does the Carl Zeiss Biogon T* 2,8/21 ZM use?

The Carl Zeiss Biogon T* 2,8/21 ZM takes 46 mm screw-in filters.

How close can the Carl Zeiss Biogon T* 2,8/21 ZM focus?

The minimum focus distance of the Carl Zeiss Biogon T* 2,8/21 ZM is 50 cm, measured from the sensor plane.

Is the Carl Zeiss Biogon T* 2,8/21 ZM a full-frame lens?

Yes, the Carl Zeiss Biogon T* 2,8/21 ZM covers full frame. On APS-C cameras its field of view equals 32 mm in full-frame terms.

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