Quote Originally Posted by Dan Daniel View Post
It'd be great to see something similar done that includes a Tessar. There are always those who prefer one to the other, claim they are the same, prefer one's bokeh over another etc. A real-world methodical Tessar vs. Planar (vs. Tessar-Tmodel version?) would give people a nice set of actual images to look at.
I've mentioned this elsewhere, but there is a story/legend that the Tessars used in the T Rolleis had a lanthanum element to improve corrections. I do know that that Tessar is a wonderfully nice lens, one of the sharpest lenses of any type I've ever used. I currently have a Standard, with an uncoated Tessar.
Another point worth making is that it is essential to be sure your Rollei is properly aligned.