Digital sensor photography requires very high resolution lenses. The Rodenstock digital objectives fully meet this requirement. The Apo Sironar digital and the Apo Macro Digital Sironar are designed for sensors whose photosite size is down to 9 microns. The Digaron S or W have an even finer resolution and can be used with sensors whose photosite size is down to 5 microns. All of these lenses have better wide-aperture resolution and must be diaphragmmed as little as possible to avoid the diffraction effect.