Rodenstock Digital Lenses represent one of the highest calibers of quality that large format lenses can provide. Apo-Sironar lenses feature sharp, fringe-free apochromatic performance.
Due to the small formats on the one hand (which are sensitive to higher diffraction) and the high illumination requirements of the CCD image sensors on the other, digital photography does not allow the lenses to be stopped down as much as in conventional large format photography. As a result, these lenses have been optimized for a working aperture of 8-11.
Because both the surface of the area sensors and the area scanned by the CCD sensors have greater planarity than conventional roll and sheet films, special attention was given to the correction of the curvature of field. The freedom from distortion, which is so important for product and building photography, and the uniformity of the illumination area is also excellent.