Raid, Pensacola has a few bayous but it takes an artist to capture them well. Nice work. When I have a problem with focus the first thing I do is try the tape test....nothing new....open the back, tape the film aperture and put it on a tripod and use a magnifier. I have one of these lenses Sn2201158[could swear this one "had coating" on the front lens] that had filter ring damage but I cleaned up and one coming in but WWII vintage, Sn2273620, coming in on a Contax III, both with "wings". Hope you find something simple was done and easily corrected though at $135 it should be in great shape to begin with. As for Contax I, I think it is underrated in the last version but you will need a viewfinder. I like the camera 50mm finder cleaned well...just fine, but for other lenses a separate finder would be necessary anyway even with the Contax II improvements. Another quick check is to mark the tape facing the front of the lens and have a look at it, looking through a SLR with medium telephoto lens set at infinity. With the Zeiss on infinity also you should see the tape markings as if under a microscope in sharp relief. [Just make certain the light behind the film aperture is bright enough for this.] Best of luck
