Experiment with different angles and form a unique view of the world with ZEISS Biogon T* 21mm f/2.8 ZM Lens – Black.
The ZEISS Biogon T* 21mm f/2.8 ZM Lens – Black offers outstanding performance and extreme resolving power even when shot wide open, with virtually no distortion, excellent control of flare and ghosting and superb contrast rendition across the entire frame. The slim lens design is easy to grip and focus, and uses a standard 46 mm filter diameter similar to many of the other ZM lenses and allows filters to be interchanged between the lenses.
The lens is rangefinder coupled for easy focusing and the optional 21 mm viewfinder is available for accurate image composition. The ZEISS Biogon T* 21mm f/2.8 ZM Lens – Blackis suitable for many different wide-angle applications including reportage work, landscape and architectural photos.
Features of the ZEISS Biogon T* 21mm f/2.8 ZM Lens – Black
- Leica M-Mount Lens
- Aperture Range: f/2.8 to f/22
- One Aspherical Element
- Two Low Dispersion Elements
- Floating Elements Design
- ZEISS T* Anti-Reflective Coating
- Manual Focus Design
- Minimum Focusing Distance: 11.8″
- Filter Thread: 72mm
- 10-Blade Diaphragm
Excellent image quality
The range of ZEISS T*® lenses offers the highest possible standards in terms of performance, reliability and, of course, image quality. Quite simply, they are superior in every way. You can count on highly advanced flare control for crisp and brilliant images, for example. And virtually zero geometric distortion, ensuring precise accuracy when reproducing shapes – especially useful when photographing products and architecture.
Smooth, precise focusing
Manually focusing a lens means controlling the image result from your fingertips. A good ergonomic design makes all the difference. The user-friendly focusing ring on ZEISS Biogon T* 21mm f/2.8 ZM Lens – Black with an ergonomic finger rest is perfect for fast, precise focusing. Changes are immediately visible in the viewfinder. The high-quality focusing mechanism moves smoothly without play, thus also supporting the intuitive interaction with the focal plane.
Ideal aperture properties
Photographers want to guide the observer through the image. Minimal depth of focus is often used as a design element. This keeps the background intentionally blurred to keep the attention of the observer on the main subject. The ZM lenses feature ten aperture blades. The almost circular aperture helps to create a particularly harmonious effect in the out-of-focus areas of the picture (bokeh).
ZEISS T* anti-reflective coating
The optical elements of ZEISS Biogon T* 21mm f/2.8 ZM Lens – Black feature T*® anti-reflective coating on all surfaces and an optical design that guarantees images of superior brilliance at all times, even in unfavourable lighting conditions. We apply the anti-reflective coating to the lens surfaces by the vapour deposition of extremely thin, transparent layers on the glass.
In this process, special substances are vaporized with extremely high energy in a high-vacuum environment and are subsequently deposited on the glass surfaces, one after another, as layers with precisely controlled thicknesses to achieve the desired reduction of reflective properties. The first coating techniques were employed by ZEISS as long ago as in the 1930s.
The mount and control elements of all ZM lenses are made of metal and are designed for decades of intensive use. The high-quality craftsmanship of the all-metal mounts, the easy-to-grip metal focus and aperture ring and the robust front bayonet and filter threads ensure an amazing photographic experience.
Specifications of the ZEISS Biogon T* 21mm f/2.8 ZM Lens – Black
|Focal length||21 mm|
|Aperture range||f/2.8 – f/22|
|Camera Mount||Leica M-Mount* (ZM)|
|Format compatibility||Full Frame|
|Focusing range||0,50 m (19.69″) – ∞|
|Angular field** (diag. horiz. vert.)||90° | 80° | 58°|
|Coverage at close range (MOD)**||470 x 710 mm (18.50 x 27.56″)|
|Image ratio at minimum object distance||1 : 21|
|Lens elements | groups||9 | 7|
|Filter thread||M46 x 0.75|
|Length (without lens caps)||64 mm (2.52″)|
|Weight||280 g (9.82 oz)|