This lens is very well constructed and has a pleasant feeling. It has a great image quality, it is a great sharpness and softness in the corner, where they can appear vignetted in large openings.
There are problems with its use in frame m42 because the opening ring has a small extra edge and a pin that prevents correct positioning.
|Angle of coverage||43º Full-frame|
|Image Format||Full-frame / 35mm|