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ZEISS Biogon T* 21mm f/2.8 ZM Lens (Silver)

BH #ZE2128S • MFR #1365-650
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ZEISS Biogon T* 21mm f/2.8 ZM Lens (Silver)
Key Features
  • Leica M-Mount Lens
  • Aperture Range: f/2.8 to f/22
  • ZEISS T* Anti-Reflective Coating
  • Manual Focus Design
Balancing a super-wide focal length with a compact form factor, the silver Biogon T* 21mm f/2.8 ZM from ZEISS is a versatile lens designed for M-mount rangefinder cameras. Its wide-angle design is complemented by a Biogon optical concept, which nearly eliminates distortion for well-corrected, accurate rendering. A T* anti-reflective coating has also been applied to individual elements to reduce lens flare and ghosting for greater color accuracy and contrast in strong lighting conditions. Additionally, the lens's manual focus design permits working with subjects as close as 1.6' away.
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ZEISS Biogon T* 21mm f/2.8 ZM Overview

Balancing a super-wide focal length with a compact form factor, the silver Biogon T* 21mm f/2.8 ZM from ZEISS is a versatile lens designed for M-mount rangefinder cameras. Its wide-angle design is complemented by a Biogon optical concept, which nearly eliminates distortion for well-corrected, accurate rendering. A T* anti-reflective coating has also been applied to individual elements to reduce lens flare and ghosting for greater color accuracy and contrast in strong lighting conditions. Additionally, the lens's manual focus design permits working with subjects as close as 1.6' away.

Biogon optical concept benefits the super-wide focal length by helping to virtually eliminate distortion for clean, realistic rendering.
ZEISS T* anti-reflective coatings have been applied to each lens surface to help minimize reflections in order to provide greater image clarity, contrast, and color fidelity.
Manual focus design enables a minimum focusing distance of 1.6'.
EAN: 4047865200035

ZEISS Biogon T* 21mm f/2.8 ZM Specs

Focal Length
21mm
Aperture
Maximum: f/2.8
Minimum: f/22
Lens Mount
Leica M
Angle of View
90°
Minimum Focus Distance
1.6' / 50 cm
Magnification
1:21 Macro Reproduction Ratio
0.05x Magnification
Optical Design
9 Elements in 7 Groups
Aperture/Iris Blades
10
Focus Type
Manual Focus
Filter Size
46 mm (Front)
Dimensions
2.1 x 2.5" / 53 x 64 mm (Diameter x Length)
Weight
10.6 oz / 300 g
Packaging Info
Package Weight
0.78 lb
Box Dimensions (LxWxH)
4.7 x 4.3 x 3.3"

ZEISS Biogon T* 21mm f/2.8 ZM Reviews

Wonderful lens

By Xiandong
Rated 5 out of 5
Date: 2025-08-24

High quality lens and high contrast image

Beautiful Lens

By DanT
Rated 5 out of 5
Date: 2014-04-16

I have number of Japanese Zeiss lenses and a German made 15mm . The fit, finish and optical design is excellent on all of them. The only complaint is some of the lenses have excess grease oozing out of the rear portion of the lens. I have had to clean this up with a toothpick and lens tissue. The 21mm is one of my favorites of the Zeiss line. Beautiful IQ. The attached photo was taken with a 6mp Epson RD1.

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