|
Horseman SW D 45mm Lens Unit with Apo Sironar Digital 45mm f45 Lens HM21383 4 Types of Lens Units Horseman SW D Pro lens units come quipped German Schneider, Rodenstock digital lenses. shortest focal length, Schneider Apo Digitar XL24, is 1 of 4 lens units that include Rodenstock Apo Sironar digital lenses of 35, 45, 55mm focal lengths. Whats more, Horseman SW seriesoriginally for film cameras lenses can be used. What Is A Digital Lens Digital photography, as opposed to c Horseman Cameras & Lenses:Lenses & Accessories:Panoramic Ca onventional film or chemical processes, makes its own demands on camera lens. A lens optimized for digital should fulfill conditions 1. image circle can be smaller, but inside that circle optical resolution, contrast should be as high . 2. In conventional large format cameras, optical resolution was considered good if it resulted in 20 lines permm. In view of high resolution of s digital sensors, lens resolution should be times higher, upto 100 lines permm. 3. Resolution of digital image drops visibly at stopped down apertures f stops. For digital photography, a lens should betooptimumMTF at wide apertures. Horseman Original Helicoid Mount helicoid mount used in SW D lens units is a, original Horseman developmentfor highest precision. model is equipped a distance scale, a depth of field scale for lens it is used on. |
