Combined with a 35 mm Biogon wide-angle lens, the Tele-Tessar T* 4/85 ZM makes for a classic combination for countless fascinating subjects. The image quality of the Tele-Tessar T* 4/85 ZM is equal to the high aperture models in the lens program. It is almost distortion free and adjusted to the field of curvature as well as to all other defects in color. With the shortest camera-to-subject distance of only 0.9 meters it delivers brilliant pictures at any distance. The all-metal mount and the robust construction turn it into a universal tele lens, even under extremely rough conditions.
|Focal length||85 mm|
|Aperture range||4 – 22 (1/3 steps)
|Focusing range||0.9 m – ∞
|Number of elements/groups||5/3
|Image ratio at close range||1 : 9|
|Coverage at close range||32 x 21 cm|
|Angular field, diag./horiz./vert.||29°/25°/17°
||M 43 x 0.75
|Dimensions (with caps)||ø 54 mm, length 95 mm
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.
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 lenses 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.
ZEISS T*® ZM-mount lenses are specifically designed to minimize focus shift with aperture changes – an important innovation with big benefits for rangefinder photography. As a result, you can expect improved accuracy of the rangefinder-defined focus. While the precise 10-blade aperture with 1/3 stop interval click stops ensures exact exposure.
The optical elements of ZEISS lenses 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.
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).