Here some more information concerning this new Sinar m lens:
Sinaron Digital HR 4.5/28 EF
Its optical parts are identical with the other well proven and best renowned
Sinaron Digital HR 4.5/28 lenses, which are also available in the Sinar p3 compatible versions CAB, CMV, and CPL.
The powerful lens with an angle of view of more than 100° resolves at least 60 pairs of lines at the edge of the image circle and well over 100 in the center. The maximal image distortion is less than 0.5%, and a color aberration does practically not exist.
The lens with an aperture range of f4.5 to f32 needs no own shutter since the Sinar m has one with exposure times of up to 1/2000 second.
It can be focused manually from 1.0 m to infinity, and is ideally suited for outdoor photography.
A rangefinder with a diopters correction and a format mask are included with the lens.
Although mainly conceived for photography at infinity, of course, the Sinaron Digital HR 4.5/28 EF can also be used for studio photography.
For best live image performance the Sinar LC Shutter can be plugged in the respective socket at the lens. The lens also allows for complete remote control from Sinar CaptureShop™ (except with Sinarback eMotion).