Troubleshooting an issue

Discussion in 'Film Discussion and Q & A' started by sbakar, Feb 16, 2010.

  1. sbakar

    sbakar TPF Noob!

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    Hi,

    I recently bought a Nikon FM and I am using it with a pre-AI Nikkor-H 50 mm f/2 lens. I shot a test roll of Fuji Superia 800, and had the film developed and printed at a local commercial place. I have uploaded the digital positives here:

    February2010 pictures by sbakar - Photobucket

    Apart from the blur from not using a tripod (not a problem), there is another more concerning problem. On every 3-4th photo, there is an area of overexposure on the right half of the frame, with a substantial bright strip that runs vertically. This is also present on the negatives, and the overexposure seems to extend beyond the frame.

    The best picture to see this on is:
    http://i300.photobucket.com/albums/nn19/sbakar/February2010/F1000009.jpg

    What is going on here? Could this be a problem with the shutter? The FM's shutter runs vertically, so I don't see how it could be due to a lagging shutter. Given that many of these issues are pattern recognition things, can someone let me know if they see something obvious that's going on?

    In the mean time, I will shoot another roll and see what happens.

    Thanks.

    SNB
     
    Last edited: Feb 16, 2010
  2. the Virginian

    the Virginian TPF Noob!

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    Last edited: Feb 16, 2010
  3. compur

    compur No longer a newbie, moving up!

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    Looks like a light leak coming in on the latch side of the film door (left
    side as you stand behind the camera which would be closest to the right
    edge of the reversed image).

    Either the film door wasn't fully closed and/or you need the light seals
    replaced (common with Japanese cameras of this vintage).

    The reason it didn't happen on every frame is that the effect of a faint
    light leak takes time to build up on the film. So, shots taken in more
    rapid succession wouldn't show the flaw but shots taken after a longer
    period of non-motion would show it more.
     
  4. sbakar

    sbakar TPF Noob!

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  5. sbakar

    sbakar TPF Noob!

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    Thanks for the reply! Come to think of it, your explanation makes perfect sense because this effect happened most often, and the strongest, in pictures that I took after a few minutes of waiting, and only in the bright sunlight. The evening shots (on page 2 of the album) don`t show any of this.

    The clincher is that there are essentially no light seals in the groove around the door! In fact, I remember thinking about this to myself when loading the film, that the seals are not there or compressed beyond belief, and that there was some play in the fully closed position (i.e. the door perceptibly moves forward and back in the closed position). Presumably the door should snap closed with no further movement. I will look into replacing the seals soon.

    SNB
     

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