Weird black spot over negatives creating a haze

Discussion in 'The Darkroom' started by Braders487, Jun 18, 2017.

  1. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

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    It's not a light leak in the back of the camera..... that would fog the relief of the film. It's an issue with the shutter. You may need new seals around the mirror chamber.

    When you say 'the shutter is working perfectly', does that mean it's been tested for light leaks? Or are you assuming that because it goes 'click' when you push the button it's functioning as designed? Have the shutter blades / curtains been checked?

    My guess is there's a leak coming in around the shutter from the mirror box.


     
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  2. Derrel

    Derrel Mr. Rain Cloud

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    I thought the light leak was coming from the shutter curtains not sealing 100% correctly...
     
  3. vintagesnaps

    vintagesnaps Been spending a lot of time on here!

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    I was thinking it looks like the shutter is malfunctioning or the mirror isn't raising properly because it seems like it's fine for a number of frames then gets an improperly exposed image. Seems like it's happening at intermittent intervals so I wonder if it will just continue to get worse. Seems like you'd need to get the camera looked at and repaired, or make it into 'shelf art' and buy a replacement camera body that could be used with the lenses you already have.
     
  4. vintagesnaps

    vintagesnaps Been spending a lot of time on here!

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    I got to thinking I remember having something similar to this happen a long time ago but don't remember if periodically frames were either under or overexposed, but don't think it was necessarily the entire frame. Not sure if I ever figured out what wasn't firing properly but seemed like something must not have been opening and closing properly every time. It was an old camera that wouldn't have been worth the cost of repair so I didn't have it checked out.
     
  5. john.margetts

    john.margetts No longer a newbie, moving up!

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    It is localised to the image area. Faulty light seals around the back will cause darkening of the film around the sprocket holes. This means that the light is coming from somewhere forward of the film gate.

    What camera is it? Focal plane or leaf shutter? Fixed or changeable lens?

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  6. compur

    compur No longer a newbie, moving up!

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    My guess is a leaky leaf shutter.

    What camera is it?
     
    Last edited: Jun 21, 2017

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