Quote Originally Posted by brian steinberger View Post
I'm interested in purchasing a Zeiss Ikon and am torn between the Sonnar or Planar 50mm. The Sonnar sounds intriguing but I'm a stickler for sharpness and this thread is helping me realize the Planar may be a better all around lens, I also hear Planar is just as sharp as the Summicron.
Although my comparison is different I feel that it is very similar. Part of my problem is that I have two different lenses and I have trouble parting with the less desireable one.

If I were in your position, I would choose the planar. I would rather have a better all-rounder sharper lens than a special use one.
If I had neither of my lenses and had to pick one, then I would go with the Summicron. I'm leaning on selling my Sonnar.