interesting. I was expecting everyone to speak up in favor of the Tessar. If your camera is not misaligned I think you will be hard pressed to find the Planar obviously superior. My first Rollei was a T with the Tessar and it was every bit as sharp as my others. Right here in APUG there have been lots of people speaking up in favor of the T and it's Tessar. The Tessar is a very famous high quality lens design that has very little flare problem even without coating. Supposedly it is a bit soft at the corners wide open.