Straight Photography!

Ja vem skall man lita på? Eller så väljer man helt enkelt dem som säger det man vill höra! ;)

"Biogon-T 2/35 ZM
This is a nine-element lens in six groups. At full aperture there is a fair amount of coma, but hardly any curvature of field. The coma does reduce the overall contrast quite visible. At f/4 coma is gone completely and the lens from there is an outstanding performer. Compared to the Summicron-M 2/35 ASPH the ZM has better curvature of field, but less contrast and crisp definition wide open. Performance on axis is equal between both lenses. This Biogon is a bit overstretched as a high-speed design. The design itself does not support high-speed lenses and it would have been better if the marketing people of Zeiss had restricted themselves to an aperture of 2.8.
The original 35mm lens for the Contarex has an aperture of 4 and was already at that aperture almost diffraction limited. Had this lens been a 2.8 design, it would have much better performance. Stopped down as it is now the performance from aperture 4 is beyond reproach, but at wider apertures it is at the level of the fourth generation of the Leica Summicron 35 lens."
Erwin Puts

Men vem bryr sig, bägge gluggarna duger att plåta med.