The Distagon T* 2/25 enables creative photography with interesting perspectives – even in difficult lighting conditions. Without a tripod, exquisitely sharp, wide-angle shots work every time. The large angular field creates a dynamic yet natural effect. With excellent image quality from the widest aperture onwards, the Distagon T* 2/25 achieves great results – from interiors to stunning outdoor expanses. Useful features such as two aspheric lens elements surfaces to correct distortion & a floating elements design ensure that you can vividly capture details framed from your own, unique perspective. When wide angle views go to extremes & beg the control via an SLR viewfinder, which means that the back focal distance has to be much larger than the focal length, a retrofous design called Distagon is the right choice. The aspherical lens design ensures consistent imaging performance throughout the entire focusing range as well as sharpness to the periphery of the image. The asphere's more complex surface profile can reduce or eliminate spherical aberration & also reduce other optical aberrations compared to a simple lens. Today’s camera technologies & high-resolution sensors demand continuous improvement of lens performance. Thanks to the use of the latest floating element design principles, optical aberration effects in ZEISS lenses are reduced to a minimum throughout their entire focusing range. This is achieved by variation of the axial distance between individual lens elements or groups. This adjustment of the lens-to-lens distance is coupled to the distance setting to ensure correct compensation at all times. The mechanical construction of these lenses is extremely complex & they must be assembled with utmost precision – both of which are key competencies of ZEIS