Hi Light Capture. Thanks so much for these additional possibilities.
I can do some of the things you suggest, such as switching battery drawer with the one in my other 201F. I will also put in a different new battery, in case the one I put in had drained while in package.
I will say, though, that I shot three rolls with the new camera -- where I did not change the back during the shooting of the rolls -- and there were no problems at all. No overexposed frames or any other problem. Also, all my exposure tests (shooting at almost all possible shutter speeds) turned out fine -- exposures were correct.
The two overexposed frames in the two rolls mentioned above were at point of changing film back. One of the overexposed frames was FIRST shot after an old back (with photos taken on my other 201F) was put on new camera. The other was LAST shot taken on new camera before I moved the new back to old camera. So, unless there is some weird coincidence happening, it seems the problem is related to back changes.
However, the first shot overexposure would fit with the battery issue you mentioned.....
I'm going to just keep the camera because they are so hard to find. Maybe I will be okay if I don't change backs mid-roll. Meanwhile, I will continue to try to figure out what happened and do things you suggest to test.
Thank you so much for your help.
I know someone who sent two 200 series bodies two months ago in for service to Hasselblad in NJ.
Both came back repaired and CLA'd. Can't remember what was the exact issue with them.
You're correct, first image you posted has nothing to do with the camera. Looking at the rebate, it's sideways. Most likely an issue with the light seal.
Front plate on magazine is thin and if dark slide is inserted at an angle combined with wear on the light seal on the plate (opposite of the mylar light seal on the magazine body) it's possible to get something like this.
The front plate will flex out in these cases possibly allowing light to enter.
Light leak seems equal on top and bottom of the image and outside of the image. It's next to impossible to get uniform leak like that from any leaks in the body.
All of my bodies are missing the mirror felt. I didn't see any light leaks due to that.
It could be tested by starting long exposure with camera in B mode. I wouldn't trust lens cap to block all of the light coming from the front. Best would be mounting lens on and placing aluminum cooking foil underneath the lens cap to block the light 100%.
1 minute, 10 minute, 1 hour exposures. Maybe longer. There is probably not much impact if it takes longer than 1 hour to show something.