ZEISS Biogon 21mm f2.8 Leica M mount black

This fast super wide-angle lens allows photographers to experiment with exceptional angles of view and perspectives.

The Biogon T* 2,8/21 ZM has exceptional imaging performance and high resolving power even at full aperture, and virtually no distortion. It is free of flare and reflections and produces excellent contrast rendition across the entire image field. The slim design feels good in the hand when focusing. Like many of the ZM lenses, it offers a 46mm filter thread. This allows one filter to be used for multiple lenses. The lens allows focusing with a rangefinder. A high-quality 21 mm attachable viewfinder is also available for image composition. The Biogon T* 2,8/21 ZM is suitable for many different wide-angle applications such as reportage, landscape or architecture.

A lens with such a wide angle of view that it can capture a great deal of the surrounding world in a single shot - this is what the name Biogon® originally meant. The largely symmetrical Biogon optics designs enable moderate to extreme wide-angle lenses of remarkable compactness for rangefinder cameras and mirrorless system cameras, for example. Distortion is exceptionally well corrected, as are chromatic characteristics and image field flattening.

Excellent image quality

ZEISS T*® lenses offer the highest possible level of performance, reliability and, of course, image quality. In other words, they are superior in every respect. For example, extremely advanced stray light reduction is available, for razor-sharp and brilliant images. And the virtually non-existent geometric distortion ensures precisely accurate reproduction of shapes - which is primarily useful in product and architectural photography.

Precise, smooth focusing

Manual adjustment of the lens is tantamount to controlling the image results "from your fingertips." Ergonomic design is everything in this regard. The focusing ring on ZEISS lenses is ideal for fast, precise lens adjustment thanks to ease of use and ergonomic finger rest. Changes are immediately visible in the viewfinder. The high-quality focusing mechanism moves smoothly and without play, so that intuitive interplay with the image plane is also supported.

Ideal aperture characteristics

Photographers want to guide the viewer through the image. A minimal plane of focus is often used as a design element. This deliberately keeps the background out of focus and draws the viewer's attention to the actual subject. ZM lenses have apertures with ten blades that form an almost circular aperture. As a result, they create a particularly harmonious effect of the out-of-focus areas of the image ("bokeh").

ZEISS T* anti-reflective coating

All lens surfaces of ZEISS lenses are equipped with the T*® anti-reflective coating and an optical design that produces brilliant images even in unfavorable lighting conditions. To anti-reflect the lens surfaces, we vapor-deposit very thin transparent layers onto their surfaces. For this purpose, special substances are evaporated one after the other in a high vacuum with very high energy. These substances are then deposited on the glass surface as layers with precisely controlled thicknesses and produce the desired reflection reduction. The first coatings were applied by ZEISS as early as the 1930s.

Robust design

The mount and control elements of ZM lenses are made of metal and designed for decades of intensive use. The high-quality craftsmanship of the all-metal mounts, the easy-grip metal focus and aperture ring, and the robust front bayonet and filter thread ensure a fantastic photography experience.