Question about Canon EOS Rebel Ti / 300V 35mm SLR Camera

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Canon Rebel 35mm - Line down centre

I have had no problems since getting the camera over 10 years ago. All of a sudden though I have been getting photos with a terrible line down the centre. It shows up clear on the negative and doesn't always show up on every photo once developed. Any ideas?

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  • bclm Jan 22, 2009

    Here is one of the photos...

  • bclm Jan 22, 2009

    I will head back to the lab. Thanks for the great in-depth response. Fingers crossed that you're right about it being the lab. Phew!

  • Gordon Stalker
    Gordon Stalker May 11, 2010

    Can you upload a scan of a neg with this problem?



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This looks as if the negative has been scratched by the minilab processor. It could be scratched in tha camera but with this camera there are only two places this could happen resulting in this kind of scratch.

One is the film cassette itself, the other is the take-up spool, where the film is wound onto itself. However this would not be likley to create a scratch affecting more than one or two negs.

Colour film has a built in orange filter which compensates for the excess sensitivity of colour papers to blue. If this is scratched away, then more blue get's through which prints yellow.

The processing machine uses sqeegee's to prevent carry-over of chenicals form one bath to another, and damage or contaminaton of any one of these can scratch the negative. This is much more likely during processing, as the emulsion is softer when wet.

Films usually have a protective anti-scratch layer, but the protection is not 100%. Also develelped emulsion is generally harder than undeveloped as the last development stage often contains chemical hardeners designed to give extra protection to the negative.

The reason it may not show on all the prints is simply that these days many colour film is printed by digital scanning. Many scanners can detect scratches by viewing the negative in infrared light. Photographic dyes are transparent to infrared in order to reduce heat absorption from enlarger lamps, so there should be no image visible in infrared, anything that is must be dust or a scratch. The image can them be processed to compensate for the scrathes making them virtually undetectable.

A thin scratch may be filled in by using pixesl just either side of the scratch to fill the scratch in. With a wider scratch, if there is some residual image then the software can use that and nearby unscratched areas as a guide to make an acceptable guess as to what was supposed to be there. If the scratch is too wide and too deep it will just give up. A bodged attempt may end-up worse than the scratch. (Often a skilled touch up artist can make it dissapear, but machines on their own are not that smart yet.)

So the good news is that your camera is unlikely to be at fault.

If this shows on one film or a batch of films processed at the same time, take them back to the processor. (I have done this before and been paid a fair amount of compensation. If they printed them at the same time it should be obvious that the negs were scratched before you took them home.)

On the other hand if this is showing on films processed at the same place over a period of time then don't use them again.

If this is happening no matter where you get the film developed, then you might need to check you camera!

Posted on Jan 22, 2009

  • Gordon Stalker
    Gordon Stalker Jan 22, 2009

    I would not worry too much about the camera.

    I run an eBay shop and EOS Rebel bodies are ridiculously cheap right now. I have sold three or four in the past 12 months each for under £30.

    These particular cameras do not seem to suffer from the problems which have affected some of the EOS range, such as sticky shutter syndrome. It sometimes strikes me as strange that often the less expensive cameras from a particular manufacturer are the ones which keep going without any but the most basic maintennance, where thier more expensive cousins do not.



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