Zeiss Biogon T* 2.8/21 ZM
Full-Frame LensProduct Gallery
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%
Pros
- Great build quality
- Good image quality
Cons
- Low maximum magnification
What external reviewers found
External score 64%
Pros
- Fully stopped-down at ƒ/2.8 aperture
- Sharpness
Cons
- Soft corners when shooting wide open
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Price Comparison
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Specifications
[{"Ft":"Construction","Fn":"Colors","Fv":"Silver or black"},{"Ft":"Construction","Fn":"Form Factor","Fv":"Ultra Wide-Angle Prime Lens"},{"Ft":"Construction","Fn":"Image Size","Fv":"Full-Frame"},{"Ft":"Construction","Fn":"Lens Barrel","Fv":"Physical aperture ring, Distance scale, DoF scale"},{"Ft":"Construction","Fn":"Lens Mount","Fv":"Leica M-mount"},{"Ft":"Construction","Fn":"Material","Fv":"metal barrel, metal mount"},{"Ft":"Construction","Fn":"Optical Formula | Elements","Fv":"9 elements"},{"Ft":"Construction","Fn":"Optical Formula | Groups","Fv":"7 groups"},{"Ft":"Dimensions","Fn":"Filter Diameter","Fv":"46 mm / 1.81 in"},{"Ft":"Dimensions","Fn":"Size | Diameter","Fv":"53 mm / 2.09 in"},{"Ft":"Dimensions","Fn":"Size | Length","Fv":"75 mm / 2.95 in"},{"Ft":"Dimensions","Fn":"Weight","Fv":"280 g / 9.89 oz"},{"Ft":"Function","Fn":"Angle Of View","Fv":"91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical"},{"Ft":"Function","Fn":"Aperture","Fv":"f/2.8 ~ f/22"},{"Ft":"Function","Fn":"Autofocus","Fv":"No"},{"Ft":"Function","Fn":"Focal Length","Fv":"21 mm"},{"Ft":"Function","Fn":"Image Stabilization","Fv":"No"},{"Ft":"Performance","Fn":"Max Magnification","Fv":"0.048"},{"Ft":"Performance","Fn":"Min Focus Distance","Fv":"500 mm / 19.69 in"}]
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External Reviews
imagingsource[1]
Reviewer score 64% (normalized by Neofiliac)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.
Pros
- Fully stopped-down at ƒ/2.8 aperture
- Sharpness
Cons
- Soft corners when shooting wide open
Also Check
References
- ^ Carl Zeiss 21mm f/2.8 Biogon T* 2.8/21 ZM. [imagingsource].
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