Not really sure what's happening on these negs

[AntonioC]

Hi everyone,

think I need some insight from you wise guys.
I noticed my M4 is producing these faint clear lines, mostly in the upper part of the frame, but in some underexposed shots (like the attached one) something similar is also visible on the right and (to a lesser extent) bottom side of the frame.
Not sure they're clearly visible given the small size of the attachment.
The camera is currently being CLA'd, should get it back in the next couple of weeks.
Any idea about what this could be?
I was thinking of some kind of light leak as I ONLY noticed the top one in previous shots, or eventually a pinpoint hole in the shutter, but noticing the other ones in this photo really leaves me wondering.
Any idea guys?

thanks!
Antonio

 

[Prest_400]

Reflections from the film gate come to mind. It is strange that it might be so prevalent. I have had some in my GW690 when the sun is close to the edges.

 

[Larry H-L]

If you view the negative directly with a loupe prior to scanning, are you able to see the dark lines on the film? Could it be a scanning artifact from the negative carrier?

 

[AntonioC]

Reflections from the film gate come to mind. It is strange that it might be so prevalent. I have had some in my GW690 when the sun is close to the edges.

This is interesting. The bottom part of the film gate shows some wearing off. Sides are perfect though.

 

[AntonioC]

If you view the negative directly with a loupe prior to scanning, are you able to see the dark lines on the film? Could it be a scanning artifact from the negative carrier?

Checked on the negs, it’s actually there...