"Planar T* 2/50 ZM The perspective of the human eye... The new standard for M-bayonet lenses. This lens is based on the renowned Carl Zeiss Planar design, a symmetric combination of 6 optical elements in 4 groups. Its features include excellent resolving power, high image quality over the entire field, and outstanding flare control. The Planar T* 2/50 ZM lens opens up new creative possibilities for all-round photography, documentation and photojournalism. Why M-mount? For more than 50 years now, passionate 35 mm photographers have been embracing the M-mount rangefinder camera system. From the lens designer's perspective, a rangefinder camera offers an exciting advantage over single lens reflex (SLR) cameras: more space. After all, there is no moving reflex mirror and drive mechanism. This allows for a short distance between the last lens element and the film meaning more opportunities for designing of superior lens types, including high performing wide-angle lenses. A passion ready for the challenge For our lens designers, the chance to develop the Carl Zeiss family of T* ZM-mount lenses was a dream come true. They were free to follow their passion in pursuit of perfection in lens performance, taking full advantage of our uncompromising symmetric lens designs. The only limitation was to reserve 15 mm in front of the film for the TTL exposure metering, commonplace in M-mount cameras. The result is a complete range of the most advanced|The Carl Zeiss range of T* ZM-mount lenses offers the highest possible standards in terms of performance, reliability and, of course, image quality.|Virtually zero geometric distortion for accurate reproduction of object shapes, particularly products and architecture|Reduces unintended focus shift with aperture variation for improved accuracy of rangefinder defined focus|Precise 10-blade aperture with 1/3 stop interval click stops ensures exact exposure|Wear resistant filter mount for long-term reliability in tough conditions|Highly advanced flare control that ensures crisp, brilliant images|Extremely accurate rangefinder coupling mechanism ensures optical precision, contributing to superior image quality"