Fogged? How?

[edswinden]

<p>Hi. I wonder if anyone can help me with this one? I shot a roll of Portra400NC 120 film on a Mamiya RB67, so I had 10 exposures. Nothing untoward seemed to happen during the two shoots when I used it. I shot five frames in o ne outdoor location, and then a further five indoors, later the same day. When I wasn't shooting the dark slide was i n, and the camera in a closed box. After the final exposure I unloaded the film, sealed it and put it in my coat pocket. I had it developed the next day at a commercial lab, and got back the film in one hour, with scans. Frames 1, 2, 3, 5, 8 an 9 were fine, but frames 4, 6 and 7 were all fogged in the same place. Frame 10 was unexposed (...I think I tried a shot with flash and it didn't fire). Do you think this fogging is most likely to have occurred when I loaded/unloaded the film, or is it more likely to be a light leak in the camera...and if so, whereabouts? I've never had this happen before with the camera. It is the fact that there was no fogging on shots between the fogged ones that confuses me. Any suggestions appreciated. I've another shoot tomorrow and no time to shoot/develop a test roll before then.</p><div></div>

[bob_sunley]

<p>Thats an awful big light leak. Most likely flare/internal reflection from a reflection off that aluminized nomex. That hard edge is usually a dead giveaway.</p>

 

[larrydressler]

<p>My thought was more reflection than fog.</p>

[edswinden]

<p>I originally thought it was a reflection from the beekeeper's veil...but the same thing is visible on this shot, in different lighting conditions, and without veil. I'm perplexed!</p><div></div>

[JamieK]

<p>Wow. That's tough. I had similarly bright white spots with a Miranda 35-mm SLR because of a pinhole in the shutter curtain. The spot was oval and blurry all the way around, but the situation was similar in that only a small percentage of exposures were spoiled. The pinhole was very small, so if two exposures were taken in rapid succession, there was no time for the frame which had moved past the shutter curtain to become spotted. It seems that you may have a similar problem, but that the pinhole could lie near an overlap of two pieces of curtain, explaining the almost-but-not-quite sharp, straight edge. There is a very great deal more light directly behind the pinhole, allowing the spot to creep past the edge there. If this explanation is correct, then keeping the lens cap on when dark slide is removed, except when making the exposure, should greatly reduce the problem. If it's a problem with the dark slide or film holder, the lens cap should still help.</p>

[thirteenthumbs]

<p>Light leak in the film holder. You shot with the film holder in Portrait position so the top left corner of the posted picture was the lower right corner when exposed putting the leak close to the film advance lever. The top cover of the Mamiya's film holder has a thin seal along its inside edge that has gone bad. Common problem with this camera.</p>