jimofnyc Posted October 13, 2014 Share #21 Posted October 13, 2014 Advertisement (gone after registration) I have seen this before. It is a shutter problem of the timing of the two shutter curtains. As the lubricant dries out, the first shutter curtain and the second begin to travel at slightly non-identical speeds, causing the gap between them to change as it travels across the film. Have the shutter replaced or re-lubricated. Link to post Share on other sites More sharing options...
Advertisement Posted October 13, 2014 Posted October 13, 2014 Hi jimofnyc, Take a look here IIIf shutter problems?. I'm sure you'll find what you were looking for!
Freddddan Posted October 13, 2014 Share #22 Posted October 13, 2014 That issue would not create horizontal stripes, it would make the exposure uneven, brighter on one side than the other. Those stripes are probably created by very narrow running, uneven curtains. I have seen this before. It is a shutter problem of the timing of the two shutter curtains. As the lubricant dries out, the first shutter curtain and the second begin to travel at slightly non-identical speeds, causing the gap between them to change as it travels across the film. Have the shutter replaced or re-lubricated. Link to post Share on other sites More sharing options...
RogerW Posted October 18, 2014 Share #23 Posted October 18, 2014 250swb is right. When i put a small piece of paper between the blinds, I could see little 'bobbles'. I left the paper in place to keep the glue where it was needed and put on a very little white PVA glue with a small brush. After a minute or so, i removed the paper and ran a fingernail back and forth along the edge of the blind. The result — no ' bobbles'. Now to test it! Link to post Share on other sites More sharing options...
RogerW Posted November 5, 2014 Share #24 Posted November 5, 2014 My DIY solution was successful. Running the fingernail along was not sufficient, but a little gentle rubbing with fine abrasive paper ensured a clean edge to the curtains. The sky at 1/1000 is now clear. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/235082-iiif-shutter-problems/?do=findComment&comment=2701038'>More sharing options...
john neal Posted November 11, 2014 Share #25 Posted November 11, 2014 I have a similar problem with shots from my older Barnacks - after much head scratching and hours with a loupe, I now know it is a moire pattern / artifact produced in the scanner where there is a large area of continuous tone (like a grey sky). I need a better scanner..... Link to post Share on other sites More sharing options...
erl Posted November 11, 2014 Share #26 Posted November 11, 2014 Coming out of 'left field', could those marks be scanner problem?I have seen such stripes that were caused by the scanner. A test would be to make a darkroom print to see if they are there. Of course, I presume you have already examined the negative with a loup or similar. Link to post Share on other sites More sharing options...
joeswe Posted November 14, 2014 Author Share #27 Posted November 14, 2014 Advertisement (gone after registration) The camera is back from the seller now. He said the fast shutter times were not set up correctly and he rectified that. I could only do a couple of quick test shots against the overcast sky. Unfortunately the lines are still there (but not as pronounced as they used to be). I used the paper trick and indeed I can see some unevenness and fraying/hairs along the edge of the curtain. It seems as if Jerzy and Roger W nailed it... Now I have to decide if I try to correct this myself like Roger or rather persuade the seller to do it for me. Big thank you to everyone for your input! Coming out of 'left field', could those marks be scanner problem?I have seen such stripes that were caused by the scanner. A test would be to make a darkroom print to see if they are there. Of course, I presume you have already examined the negative with a loup or similar. The lines are easily visible to the bare eye on the negative. Link to post Share on other sites More sharing options...
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