Q about scratches on slides

[LondonJ]

I am a new & inexperienced rangefinder user!

I recently acquired a Canonet QL17 and put a roll of Sensia 100 through it. This film was developed by the Fuji labs in Warwick (UK).

When I viewed the slides, there are many fine horizontal black lines on nearly all the slides. Some are worse than others, and the lines are in different places on each slide.

This is only the second roll of slide film I've used, ever.

I am unsure if these scratches were made by the camera or by the lab that developed the film. Which do you think is most likely?

Thanks for any help!
-J

 

[c.poulton]

Considering that the lines are in different places on each slide I feel that it may be done to the lab. If it was the camera I would expect the lines to be consistant.

 

[pvdhaar]

Scratches may be caused by emulsion particles that have been scraped loose from the film by an irregularity on the film guides or the sprockets. When rewinding, these end up in the light seal on the 35mm canister and do their damaging deeds there. Check that there's nothing wrong in the film path (including guides/sprockets/etc).

If you keep having scratches, completely advance and then rewind a (cheap!) film. Take it directly from the cannister and look for scratches on the undeveloped emulsion. If there are already scratches, it's your camera. If not, it's someone elses doing..

 

[jaapv]

And these tramlines are pretty annoying. The only thing one can do is scan the slide and clone out the blemishes and print them. There used to be some oily gunk one could wipe onto the slides prior to projecting but I don't know that it still exists nor the long term effect on the slides.