I went down an picked up the camera yesterday. The Tessar in a rim-set Compur. I does not look to be coated, but that could just be that I don't know what to look for. The Xenar is a pretty little thing, It is also in a compur. I'm going to mount it on a lens board and take it out with my Chamonix and shoot the same photo with both and see if I can tell any differences. I'll also see if there is any difference in image circle based on pure observation. Now that I have them both hand in hand, I can say that the Xenar is only slightly larger than the Tessar. Looking at it in a photo when mounted on the camera made it look bigger than it was. It is, however a little larger. It is definitely coated. I doubt if I'll be able to get out this weekend, but I'll try to do a serious comparison of the two and post what I find out here. It should be fun regardless of the results.
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