Quote Originally Posted by illumiquest View Post
I used a Nikon 50 f/2 which was relatively cheap and did a great job. It's not a summicron but still nice.
Me too. It's an adaptation of the 6-element Sonnar design, same as the Jupiter-8; the 50/1.4 Nikkor is a version of the 7-element Sonnar, but quite a bit more expensive. I think the situation is the same with the Canon 50mm lenses---one of each Sonnar "flavor".

In my experience, the 50/2 Nikkor is a nice, workmanlike lens, quite respectably sharp but not Summicron-sharp, with a pretty neutral character. It tends to get out of the way and let you take the photo you see. Very good bang for the buck, even if the aperture ring *is* backwards.