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Identifying film artefacts

  
 
Yogifi
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p.1 #1 · Identifying film artefacts


Hello. I've been quickly testing some recent purchases before the return window expires.

With the RB67 I noticed some weird marks that look like spots that glow, I've attached some crops below:













I noticed they look quite similar in three of the photos - and I know they scan them three at a time:







But in other photos of the same orientation, that area would be mostly fine, and the splotches would be somewhere else and look a bit different.



The 120 film negative was professionally developed and scanned....despite appearing incredibly dusty. Dissappointingly so. I took it straight out the back, closed it down carefully and put some small tape on the back to keep it sealed...handed it to them that same day.


I thought it might be something like a shutter holes. With the RB67, the shutter is in the lens, I tried looking through it and didn't see anything.

Any ideas on what it might be?
Perhaps splotches during development like hair/dirt causing some chemicals to stick to those spots rather than wash over?
But the fact that they appear almost identical in 3 images (but not all of them) makes me think it's to do with the scanner...

I also only got 8 scans back, including the first one with half the image blown out.



Jan 11, 2026 at 01:47 PM
Desmolicious
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p.1 #2 · Identifying film artefacts


Try a different lab. For them to return scans to you that filthy does not bode well for whatever they are doing.
Those marks look like light leaks, but if could be from the lab, so the first thing I would do is try a different one, then if you still have issues you know it is not that.



Jan 11, 2026 at 03:59 PM
Norm Shapiro
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p.1 #3 · Identifying film artefacts


Looks like dust etc on the negatives. Not anything from the camera. I’ve given up doing my own b&w because I don’t have a clean place to dry my film. And am too lazy to build a simple drying cabinet.
I agree with Des… find another lab.

Also I scan my film and Silverfast does a very good job of dust removal.



Jan 11, 2026 at 06:06 PM
theHUN
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p.1 #4 · Identifying film artefacts


White spots that are in focus are dust on the film during scanning.

White spots that are slightly out of focus is dust elsewhere in the scanning system (carrier or a glass surface).

While there could be dust on the film while it is in the camera, I think it would show up as black spots, so I think we can rule that out.

There could be dust/defects on the back most lens element as well, but in a medium format SLR those would be waaay out of focus on the film.

So I think the camera/lens/back are fine. But whoever is doing the scanning is a filthy animal.



Jan 11, 2026 at 08:04 PM
Desmolicious
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p.1 #5 · Identifying film artefacts


theHUN wrote:
So I think the camera/lens/back are fine. But whoever is doing the scanning is a filthy animal.


Yeah, that is totally unacceptable to have scans like that delivered to a paying customer.



Jan 12, 2026 at 12:58 PM







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