Zeiss Biogon T* 2.8/21 ZM Full-Frame Lens
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Product Overview
Zeiss Biogon T* 2.8/21 ZM is a high-end manual-focus ultra wide-angle prime lens for Leica M-mount. It covers the full-frame image circle and has 9 elements in 7 groups.
As an ultra wide-angle prime lens that happens to have relatively small maximum aperture, it is best suited for landscape photography. Even though the lens is not stabilized, at this focal range it does not usually matter. In fact, some may be able to get cleaner corners without image stabilization.
Ratings
What we found**
Neofiliac score 78% (not directly comparable across industries)
Pros
- Great build quality
- Good image quality
Cons
- Low maximum magnification
What external reviewers found***
External score 64% (not directly comparable across industries)
Pros
- Fully stopped-down at ƒ/2.8 aperture
- Sharpness
Cons
- Soft corners when shooting wide open
Price Comparison
Specifications
Construction
Colors
Silver or black
Form Factor
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Leica M-mount
Material
metal barrel, metal mount
Optical Formula | Elements
9 elements
Optical Formula | Groups
7 groups
Dimensions
Filter Diameter
46 mm / 1.81 in
Size | Diameter
53 mm / 2.09 in
Size | Length
75 mm / 2.95 in
Weight
280 g / 9.89 oz
Function
Angle Of View
91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical
Aperture
f/2.8 ~ f/22
Autofocus
No
Focal Length
21 mm
Image Stabilization
No
Performance
Max Magnification
0.048
Min Focus Distance
500 mm / 19.69 in
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Launch Comparison
Clear List
External Reviews
imagingsource[1]
Reviewer score 64%The Zeiss 21mm ƒ/2.8 Biogon T* is an all-metal lens, weighing in at 280 grams (just under 10 oz) It is about the same length as the Sony 18-55mm kit lens, but slightly slimmer. The lens was attached to the NEX-5 with a Leica bayonet mount to NEX E mount adapter purchased on Ebay.
Find the original article here.
Pros
- Fully stopped-down at ƒ/2.8 aperture
- Sharpness
Cons
- Soft corners when shooting wide open
User Reviews
Comments
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References
- ^ Carl Zeiss 21mm f/2.8 Biogon T* 2.8/21 ZM. [imagingsource]. https://www.imaging-resource.com/lenses/carl-zeiss/21mm-f2.8-biogon-t-2,821-zm/review/. Retrieved 2022-01-23.
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Scores are not directly comparable across industries.
These key takeaways ("pros" and "cons") and summaries are identified from third-party reviews. They may differ from the original texts.
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