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Post by gray1720 on Dec 30, 2022 10:40:24 GMT
Better scan from my Daci Royale box camera. There's an over-exposed streak right down one side for the length of the film. It's not from the red window as that's in the middle - see the mark at the top of the frame - and it doesn't cross between frames either. It looks for all the world like shutter capping, but I'm fairly sure that a simple rotary shutter can't cap.
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Post by zou on Dec 30, 2022 10:54:35 GMT
If the film runs vertically then it would appear to be a one-sided issue. Seems rather even for a light leak. Is there anything mildly reflective inside which might overexpose that side of the film?
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Post by steveandthedogs on Dec 30, 2022 11:28:02 GMT
I think I'd go with Zou.
S
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Post by gray1720 on Dec 30, 2022 11:59:30 GMT
Doesn't seem to be anything that wouldn't be hidden from the film by the cone. If I point it at the light, though, I do see a brighter lens-shape bottom-left of the 'ole as the shutter passes. There's also a capping shutter that pings back after the rotary shutter passes, but I doubt that's the issue, it takes far too long before it returns.
I think I need to get in with the lighter fluid and graphite...
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Post by peterob on Dec 30, 2022 12:03:25 GMT
Could it be uneven development rather than uneven exposure? note -I haven't developed a film for nearly 20 years.
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Post by nickr on Dec 30, 2022 12:24:55 GMT
Could it be uneven development rather than uneven exposure? note -I haven't developed a film for nearly 20 years. Then you would expect to see the effect on the rebate. It's either an internal reflection on the right of the camera, or some sort of obstruction to or fault of the shutter. |
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Post by MJB on Dec 30, 2022 12:47:24 GMT
No idea what's going on with the photo, but my grandad was paid my International Harvester and McCormick to use their tractors at the world ploughing championships in the late 50s. We have the original photo somewhere but this is him on aforementioned tractor. Attachment Deleted |
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Post by geoffr on Dec 30, 2022 12:54:20 GMT
If it were a focal plane shutter I would suggest uneven motion but a rotary shutter can't do that. The fact that it isn't simple fogging, there is a darker band either side of the light area, does suggest a reflection. I agree with Nick that some sort of obstruction is possible but I can't see how it would cause that effect. As always, it is difficult to diagnose a fault at a distance (even though I was once expected to do just that).
Does this affect the whole length of the film?
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Post by gray1720 on Dec 30, 2022 13:48:47 GMT
Yes, it's right down the film from end to end.
Martin - thank you for telling me, right up my street!
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Post by squeamishossifrage on Dec 30, 2022 14:01:52 GMT
Is it just me, or is there a slightly over exposed streak to the right of the underexposed streak? It appears most prevalent at the top of the second picture.
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Post by gray1720 on Dec 30, 2022 14:05:38 GMT
Yes, you are right - GeoffR spotted it two posts up, and all three of us can see it.
Looking through the red window and tripping the shutter, I'm defintely not always seeing a clear circle as the shutter rotates - I think it's a shutter issue, though I'm keeping reflection in reserve. Grr, thought the unbuggering list was shrinking...
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