Dark bands across negatives

<p>I developed my first roll of film today tmax 400 120 size shot on a mamiya 645 1000s . It seems to have dark bands running through some of the negatives but not all. I was unsure what went wrong. Any help would be greatly appreciated.<br /> <img src="http://i.imgur.com/r6h7Uta.jpg" alt="" width="1836" height="2448" /><br /><img src="http://i.imgur.com/ivIQXMh.jpg" alt="" width="1836" height="2448" /></p>

<p>Second shutter curtain hanging up? Just a guess!</p>

<p>Did you use a flash, if so maybe you had the shutter speed to high.</p>

 

<p>No flash was used, the only thing I can think of possibly is a light leak near the hinge of the loading door or failure to load the film in subdued light. Other than either of those, I am unsure what would cause it.</p>

<p>The band goes across the mask. It's either a light leak in the back or the film was not protected after it was removed from the camera.</p>

<p>Is this a re-occurring problem or just this once? </p>

<p>Unsure, I just got into film photography not too long ago and this is my second roll shot, first developed by me (still waiting on lab for my first roll). I guess my best bet would be to put some black electrical tape over the back for now and when I finish shooting this roll, unload in darkness. Then put a small light in the back and see if light shines through?</p>

<p>As Peter points out the band goes to the edges of the film. A sticking shutter curtain would make uneven exposure in the image area only. The bands are evenly spaced so the extraneous light is coming in through the hinge or the latch. I suspect the latch.<br>

Instruction manual:<br>

http://www.mamiyaleaf.com/assets/files/documentation/M645_1000S_v4.pdf<br>

With the lens removed, shutter open, mirror up, and back closed both with film insert installed and removed shine a bright light in from the lens opening in total darkness. A mini mag set to spot at 2 inches works well for this type of testing. Any hint of light is anything visible other than totally black and is a light leak. Another possibility is the back was not properly closed.</p>

<p>OK, thank you very much, I'll try those when this roll of film is done.</p>

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<p>The band goes across the mask.<br>

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<p>Good catch on that.</p>

<p>I'm not convinced it's the camera. I have a m645 and the back would only let light in on the paper side, which would not give you the streak you see.</p>

<p>I would suggest looking at how well wrapped the film was when you took it out of the camera or look at what you did at processing time.</p>

<p>Just my thoughts.</p>

<p>Since it's always in the same place relative to the frame, and has one sharp edge, almost certainly a light leak in the camera.</p>

 

<p>Well, I did what you guys suggested, I got good and bad news. I opened the shutter, removed the lens, put the mirror up and shined a mag light in to see a light leak with and without the film holder in darkness... no light leak. I double and triple checked. That's the good news, bad news is that I still don't know what it is but I can only assume operator error at this point.</p>

<p>my M645 1000s had similar problem. New seals on rear door fixed it.</p>

<p>I shot another roll and the dark bands were in the exact same spot, must be a small light leak on the back door. Ordered new light seals from Jon Goodman, hoping that fixes the problem!</p>