Yesterday, I took my Canonet 28, along with my distored pictures to a camera repairman to get his diagnosis of the camera's problem. I actually didn't get a chance to talk with him personally, but I explained the problem to the "counter girl," and she relayed it to the camera tech. I shared with her some of the input I received, i.e., pressure plate, lens hood, etc. After looking at the pics, the technician said he thought it could the shutter! Therefore, I'm not sure in which direction I should go, but here's a thought I had. Looking through the back of the camera, the shutter looks OK, and I've been shooting with a zinc air 1.4V battery. I don't know if or how that would affect the shutter, but today I switched to a regular 1.5V battery and ISO 400 film. So, back to the firing line to see what results, if any, there will be. So, keep tuned, same time, same station [as they used to say decades ago]!