Mark On Every Frame (Hasselblad 500cm)

<p>Hi all,<br /> I'm having a problem with my Hasselblad 500CM. I have two different film backs. On two of my reels that I've processed, there is an extremely distinctive, large, black rectangle that appears in the exact same position. I do not know the cause and it does not appear on every reel! <br /> Here are two examples:<br /> /> https://www.flickr.com/photos/katoch/27866434663/in/photostream/<br /> Any advice identifying the cause would be greatly appreciated!</p>

<p>It looks like a piece of material sticking out at about the film plane. Can you open the back and see if there is some material hanging there?</p>

<p>What Stephen said. Betcha it's a scrap of tape or backing paper that got caught in the rollholder.</p>

<p>I suspect that the light trap shield, which holds the light trap in place, was damaged, and is sticking out into the frame area. Remove the dark slide and you should see it.<br>

www.david-odess.com</p>

<p>Thanks all. I looked at the A12 back and found some v old paper from some v old film trapped inside. <br>

It must have been creeping out when I loaded and wound film, and creeping back in when I re-wound the film at the end, because it was barely visible and hidden behind the film plane. I unscrewed the film plane and removed it. Appreciate all of your advice. </p>