Having Bessa R2A and 35mm lens I am thinking about tele lens. 50mm is somewhere in my mind, but first I will get to something longer. So, as choices are 75mm and 90mm, I would like to know which lens is optically and mechanically "better". Optical performance would be main reason for choice.
If both lenses are "same" regarding quality I will go to 90mm.
Oh, and since here nobody sell/rent CV lenses, I can't rent/borrow them to try for myself, so your answers are my only source of informations. Beside Stephens and Irwins sites...
Irwin tells 75mm is OK, and 90mm is great lens for its price. Stepehen tells: "Again, users reports great, sharp images with the 75/2.5", "The MTF charts of the lens at the Cosina site are outstanding, as well as initial test results from a UK photo magazine. This may turn out to be one of the sharpest 90's ever, in screw mount or M mount"
So, what are yours opinions?