This ultra wide-angle lens is the pinnacle of modern rangefinder lens design. The Distagon T* 2,8/15 ZM is a rectilinear lens with very dynamic perspective effects for critical architecture and interior photography. It is a fast lens for the focal length, allowing for hand-held photography under difficult lighting conditions. The lens is made in Germany and incorporates a very complex optical design using exotic optical materials such as barium dense flint with a high refractive index and fluor crown with anomalous partial dispersion. It uses aspheric lens elements and an internal focus mechanism for distortion-free images and consistent performance over the whole frame and across the entire focusing range. The standard center filter compensates for the natural vignetting effect and provides even tonal reproduction across the image field. When used with the 15 mm viewfinder, the Distagon T* 2,8/15 ZM is an ideal match to the Zeiss Ikon SW camera. Combined with a digital rangefinder camera with a 1.3 crop factor, the lens has an effective super wide-angle focal length of 20 mm and also delivers impressive perspective effects.