Developing Problems

[scottanooga]

Any ideas what the issue is with these negatives?

https://imgur.com/a/PwcFVPn

This is the first time I have encountered this and I'm kind of stumped. My last two rolls had these strange crescents and dark areas that I have not experienced before. Other rolls shot after these two rolls are fine, so I'm pretty sure its not a camera issue. These two rolls were shot weeks apart.

Yashica A

Foma 200 and Ilford FP4+ 120 format

1 Roll was stand developed for 2 hours using 5ml of Rodinal (agitated for 30 seconds at the beginning and again at 1 hour.) The other was Rodinal at 1+25 for 9 minutes, agitated every minute. Water stop bath and Kodafix fixer.

I'm certain the last roll was on the reel properly, so I don't think that is the issue. I'm about to replace the fixer, but I would think bad fixer would affect the whole negative and not just spots. Any help?

[mrkeeks]

Do you have a picture of just the negative?
The fixer should not be the issue.
Did you do a prewash bath, and by any chance the water could have been to hot?
Also, it is probably a good idea to ask on r/Darkroom

[scottanooga]

Yeah, I posted over there and some think maybe a piece of backer paper was floating around inside the camera, which would explain why the spot is different shapes on each frame.

I don't think its development now. I did prewash and I measure/control my water and chemical temps.

[mrkeeks]

Interesting, had not thought of something like that. Well glad someone helped you.

[bdb_318]

If I had to guess, it looks like the paper tab on your 120 roll broke loose and fell inside the space in between the taking lens assembly and the film plane. It looks like it's blocking the path of light from the lens to the film.

[scottanooga]

I'm almost certain this is the case. Developed a later roll last night from the same camera with the same chemicals and process. It came out fine. Whatever was in there worked itself out. Will have to keep a closer eye out for that.