Quote Originally Posted by brian steinberger View Post
I just purchased a used Carl Zeiss 35/2 Biogon ZM T*. I figure the extra stop of speed could be beneficial if it's my only lens. I've heard reports of the f/2 being slightly soft wide open, but to me getting the shot and it being a little soft is better than not being able to get the shot at all.
I think you're gonna be happy that you didn't compromise on lens speed. That's the kind of thing that can nag at you later (especially with a Leica). You may get the Summicron urge somewhere down the line, but I doubt it will be for softness wide open. There should be far more than adequate sharpness at f2 for the types of pictures a person will usually shoot at that aperture.

Enjoy the lens and don't fret the details.