Strange artifact on B&W film

Started 2 months ago | Questions
b go New Member • Posts: 3
Strange artifact on B&W film

HI,
Preface: complete beginner, bought a TLR 2 months ago because it looked cool, never owned a camera before other than my phone, took a short course on shooting, developing and printing B&W and now am busy making beginner's mistakes and learning. 
These are the first film's I've developed on my own without supervision. I seem to get this strange artifact in the negatives. This one is on Ilford Delta 400, shot with a Mamiya C33 and developed in ID-11. This happened to 2 pictures on the roll

In the upper left corner there's this transparent spot. It's not a scanning error, it's also in the physical negative.
Same thing happening with lomography lady grey, developed in Df96 monobath. This happened to every picture on the roll.

this time it's more to the right. 
Am I loading the film incorrectly onto the reel or something? what causes this?
I have rolls shot later with the camera where this didn't happen, so it's not the camera.

Thanks in advance for the help.
  B

P.S. yes I know there's dust and water marks, i've cleaned them since but not rescanned them, since I was using someone's epson v700 for these and it takes ages...

ANSWER:
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Tom Axford Veteran Member • Posts: 8,435
Re: Strange artifact on B&W film
7

b go wrote:

HI,
Preface: complete beginner, bought a TLR 2 months ago because it looked cool, never owned a camera before other than my phone, took a short course on shooting, developing and printing B&W and now am busy making beginner's mistakes and learning.
These are the first film's I've developed on my own without supervision. I seem to get this strange artifact in the negatives. This one is on Ilford Delta 400, shot with a Mamiya C33 and developed in ID-11. This happened to 2 pictures on the roll

In the upper left corner there's this transparent spot. It's not a scanning error, it's also in the physical negative.
Same thing happening with lomography lady grey, developed in Df96 monobath. This happened to every picture on the roll.

this time it's more to the right.
Am I loading the film incorrectly onto the reel or something? what causes this?
I have rolls shot later with the camera where this didn't happen, so it's not the camera.

Thanks in advance for the help.
B

P.S. yes I know there's dust and water marks, i've cleaned them since but not rescanned them, since I was using someone's epson v700 for these and it takes ages...

Possibly a small piece of paper or cloth that is at the bottom of the film gate just in front of the film and so blocks the light during the exposure.  It may move around as you wind on the film.

Next time you change the film, look very carefully into the film gate to see that there is no detritus between the back of the lens and the film. You may have to hold the camera with the lens uppermost and shake it a bit to make sure there is nothing loose.

Tomm111 Senior Member • Posts: 1,357
Re: Strange artifact on B&W film

Welcome, just some dirt in the camera, since the edges are fairly sharp probably just in front of the film as was said before. Also could be an air bubble on the film, prewetting helps, setting the tank down fairly hard after agitiation also helps.

About the V700, what resolution do you use? The scanner maxes out around 2400-3200 ppi. Anything higher is just empty pixels. If I am only displaying 2 1/4 on line, I generally use1800 ppi, my V700 seems the sharpest there, I'll scan at 3200 if I am enlarging for printing.

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OP b go New Member • Posts: 3
Re: Strange artifact on B&W film
3

Thanks, that was it. There was a bit of the paper from the begining of the roll.

OP b go New Member • Posts: 3
Re: Strange artifact on B&W film

This was 1200 dpi, this was only to see how it looked. Still took me a while to scan 4 rolls of 120

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