Chriscrawfordphoto
Real Men Shoot Film.
This isn't exactly a rangefinder question but I am hoping someone can help, this is driving me nuts. I have developed film for 16 years and never had this trouble till a few months ago.:bang:
http://www.chriscrawfordphoto.com/examples/fog-neg.jpg
I keep getting this weird fogging as seen in the neg scan. It doesn't happen
all the time but when it happens it is only on the first 10-12 frames. The
first few times I saw it it happened on Tmax 3200 film and I thought I had
narrowed it down to one of my OM-4T bodies but this time it happened with
another camera. The last few times I've had it happen were on Efke 100 film.
I don't think its a camera light leak anymore because of it happening on
more than one camera. I don't think its the developing tank leaking
because it is on the frames that are in the center of the reel and I use
metal tanks with metal lids. I think if they leaked light it would affect
the frames near the outside of the reel (end of roll). Also it has happened
with more than one dev. Tank. If it was just the Efke film I might think the
film cartridges leaked light given the lower quality of the carts they
use...but this has happened with several rolls of Kodak film too. The only
other thing I can think of is the changing bag I load the reels in for
developing. I don't have a darkroom so I use the bag...but I do it in a
darkened room and if it were leaking wouldn't it affect all the frames on
the roll? Plus, I developed two rolls in the tank (a 4 reel size
tank...filled the empty places with empty reels) and the other roll was not
affected at all!
What do you guys think? Anyone seen this before? Thanks,
Chris
http://www.chriscrawfordphoto.com/examples/fog-neg.jpg
I keep getting this weird fogging as seen in the neg scan. It doesn't happen
all the time but when it happens it is only on the first 10-12 frames. The
first few times I saw it it happened on Tmax 3200 film and I thought I had
narrowed it down to one of my OM-4T bodies but this time it happened with
another camera. The last few times I've had it happen were on Efke 100 film.
I don't think its a camera light leak anymore because of it happening on
more than one camera. I don't think its the developing tank leaking
because it is on the frames that are in the center of the reel and I use
metal tanks with metal lids. I think if they leaked light it would affect
the frames near the outside of the reel (end of roll). Also it has happened
with more than one dev. Tank. If it was just the Efke film I might think the
film cartridges leaked light given the lower quality of the carts they
use...but this has happened with several rolls of Kodak film too. The only
other thing I can think of is the changing bag I load the reels in for
developing. I don't have a darkroom so I use the bag...but I do it in a
darkened room and if it were leaking wouldn't it affect all the frames on
the roll? Plus, I developed two rolls in the tank (a 4 reel size
tank...filled the empty places with empty reels) and the other roll was not
affected at all!
What do you guys think? Anyone seen this before? Thanks,
Chris
wpb
Well-known
Looks like over-agitation. I used to get the same marks developing 35mm film in a Jobo CPE-2.
Chriscrawfordphoto
Real Men Shoot Film.
wpb said:
Wouldn't that affect both rolls I processed in the tank as well as more than just the first frames? The second roll in the tank had no fogging at all
wpb
Well-known
I know... common sense would dictate it should be on both rolls (and on the entire roll) but it is the motion of the fluid in the tank that is the culprit (if this is the case) and that is a situation that is almost impossible to pin down exactly. The size (thicker gauge steel) of the reels, and the size and placement of the empty reels, the length and type of film being processed as well as the force and quantity of inversions can all have influence on the motion of the developer. My first step would be to use less force and fewer inversions when agitating. I would also try to develop full tanks without empty reels.
I agree; as soon as I saw the pattern around the sprocket holes I recognized it immediately as enthusiastic agitation. 