I tried out Huck Finn's Sonnar 40/2.8 in the lens testing project of 35m-40mm lenses. It seems like a wonderful combination of modern lens design with near-vintage look to the images. I just picked up another roll taken with this lens (and the ZeissBiogon 35/2). I used f 5.6 for the portraits. The images came out very nice looking; sharp in the face but not surgically sharp. Colors lokk very nice too.