The zeiss 25mm f28 t biogon zm silver lens offers exciting visual perspectives and is also one of the easiest to control it delivers high contrast across the entire image field and is virtually free of distortion even at full apertures with the aperture stopped down detail is finely rendered with a pleasing three dimensional quality the lens is rangefinder coupled for easy focusing and the optional 2528 mm viewfinder is available for accurate image composition combined with a digital ran