I have an early 50/1.4 Nikkor in LTM that I've
been shooting off and on with an M3. It's a
Sonnar design, supposedly optimized for work
close in and wide open -- what I typically do.
For illustration, I've posted a sample from my
Nikkor (at f/2) here in the APUG forums:


I've been told that I should consider using a
rigid Summicron on the camera. Okay: But
might I expect the Summicron to compare to
my Nikkor?

Apologies if this has already been discussed