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Thread: long exposure and 10/8

  1. #1

    Join Date
    Nov 2006
    Posts
    16

    long exposure and 10/8

    I have recently moved up from 4/5 to 8/10 and do alot of long exposure work at night. On occasion I have had the film pop epecially after a really long exposure rendering parts of the neg unsharp. To prevent this I use small pieces of double sided tape to tack the non emulsion side of the film to the holder which seems to work well but makes unloading a little tricky.
    Does anyone have any other suggestions...
    Thank you.

  2. #2
    Whatever David A. Goldfarb's Avatar
    Join Date
    Mar 2000
    Location
    Honolulu, Hawai'i
    Posts
    4,658

    Re: long exposure and 10/8

    Presuming you're loading the sheets properly (be sure the leading edge is under the lip at the darkslide end of the holder), a couple pieces of double sided tape is as good a solution as any. Some people use a tacky spray adhesive for this.

    If you're particularly industrious you could design your own vacuum filmholder for long exposures that uses a bulb or small blower to create the vacuum. I recall that there was an astrophotographer who put up a web page describing how to do this and there is a link to the page somewhere on this forum that you might turn up with the search engine.

  3. #3
    umop episdn
    Join Date
    Mar 2007
    Location
    Texas
    Posts
    143

    Re: long exposure and 10/8

    Hey, that was me over on APUG. I've tried the bulb idea and it's a bit lacking - you have to contantly be squeezing it and the force isn't constant. An electric motor is far better.

  4. #4

    Join Date
    Aug 2000
    Location
    California
    Posts
    3,908

    Re: long exposure and 10/8

    When photographing at night it is necessary to wait for the film to pop prior to making the exposure. No vacuum holder needed.

    Cover the camera with your dark cloth, remove the dark slide and wait 2 or 3 minutes before making the exposure. The film will pop during this time and you will not have a double image.

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