Pentax 67 light leak?

[John Wiegerink]

A hole in a shutter would cause fog, or pinspots of light, not dark lines. Either something is blocking light from the film or something is scratching the emulsion side, although I can't think of what that might be in a Pentax 6x7. JWatts image looks like an emulsion scratch or abrasion. The marks are similar to clip marks you might see on sheet film done at a lab using a dip and dunk processor. Again I can't think of what might cause this particular case. Now I really want to know!

I didn't look at the OP first picture and only looked at the color shot. Was kind of wondering if the print was made from a slide or neg. Now that I see the first example I too, have to rule out light leak. This is a good mystery! Should contact Holmes on this one. JohnW

 

[ChuckP]

Maybe you can set the camera on B.Then put a piece of cardboard over the lens and fire the shutter off. Remove the cardboard after the shutter is open and put it back over the lens after the correct exposure time. Then release the shutter. I believe that this would take shutter curtain problems out of the picture. You could try to shoot a roll with some exposures using the cardboard method and some with normal B and see if they are different.