The Carl Zeiss range of T* ZM-mount lenses offers high standards in terms of performance, reliability and, of course, image quality. You can count on highly advanced flare control for crisp and brilliant images. And virtually zero geometric distortion, ensuring precise accuracy when reproducing shapes, especially useful when photographing products and architecture.The Zeiss 15mm f/2.8 Distagon T* ZM is an ultra-wide angle lens designed for high-speed performance and full integration with TTL-exposure metering. It features a floating lens element optical design that includes 11 lens elements that have a high refractive index and fluor crown with anomalous partial dispersion and an aspheric surface, and has a minimum focusing distance of 11.8" (0.3 m). Allows the creative photographer to shoot wide vistas, documentation in cramped spaces, and extremely dynamic architectural photos.