ktphotonics
New Member
> [I own both lenses. Although both lenses are very good performers for sharpness, I would say the 100mm has a definite edge, especially at wide open apertures and over the entire picture area. It is also considerably smaller and lighter. If I want to do some informal portraits, it is my lens of choice. It focuses down to 1 meter, compared to 1.6 on the 135mm. I have been in and out of Contax a few times and I have always sought and bought this lens, in AE and MM mounts. Note, you cannot use the 1.4 converter with the 100mm]