Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 76,261   Posts: 1,680,566   Online: 943
      
Results 1 to 10 of 10
  1. #1
    horacekenneth's Avatar
    Join Date
    Aug 2012
    Location
    MD
    Shooter
    Multi Format
    Posts
    406

    Light leaks, I think, disappear as the roll moves along?

    So I'm seeing some very slight black edges on the top and bottom of my 35mm negatives, so slight it's all on the right side of the sprocket holes (i.e. away from the picture, not causing visible problems yet). It's about two fingernails long and occurs between photos for the first ten photos, after that there's no marks at all.

    I'm thinking it's a light leak but two things are strange to me, the fact that it happens equally on the top and bottom of the negative and the fact that they go away about a quarter of the way into the roll. What could be causing that?

  2. #2
    mweintraub's Avatar
    Join Date
    Dec 2008
    Location
    Dallas, TX
    Shooter
    Medium Format
    Posts
    931
    They could be going away because you're not in enough light anymore for the harsh light to penetrate the camera back.

  3. #3
    horacekenneth's Avatar
    Join Date
    Aug 2012
    Location
    MD
    Shooter
    Multi Format
    Posts
    406
    Quote Originally Posted by mweintraub View Post
    They could be going away because you're not in enough light anymore for the harsh light to penetrate the camera back.
    I don't think so, first, I'm shooting in a variety of light throughout the whole roll and second this has happened on four or five rolls now and it's always consistent about where the leaking starts and ends.

  4. #4

    Join Date
    Jan 2014
    Location
    Carolinas
    Shooter
    35mm
    Posts
    40
    Replace all the light seals, on both ends of the door and in the grooves top and bottom on the body.

    I use self adhesive felt on the doors and wool knitting thread in the grooves. Works great.

  5. #5
    MattKing's Avatar
    Join Date
    Apr 2005
    Location
    Delta, British Columbia, Canada
    Shooter
    Multi Format
    Posts
    14,201
    Images
    63
    Are they bulk loads or are they factory loads?

    Are you using one of the films that is susceptible to light piping?
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  6. #6
    horacekenneth's Avatar
    Join Date
    Aug 2012
    Location
    MD
    Shooter
    Multi Format
    Posts
    406
    I am using Arista.edu 400, not bulk loading.

    I do plan on replacing the light seals, I'll get a kit from Jon Goodman, but it's just strange to me that it stops after the first ten frames and is mirrored perfectly above and below, makes me wonder if it's something else.

  7. #7
    MattKing's Avatar
    Join Date
    Apr 2005
    Location
    Delta, British Columbia, Canada
    Shooter
    Multi Format
    Posts
    14,201
    Images
    63
    One final question:

    Are you, by chance, using one of those cameras like the Canon Rebel 2000 that first winds the film to the end and then winds it back into the cassette, one at a time.
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  8. #8
    Ken Nadvornick's Avatar
    Join Date
    Mar 2005
    Location
    Monroe, WA, USA
    Shooter
    Multi Format
    Posts
    4,348
    Images
    50
    For roll film a repeating light leak on only the first few frames can sometimes indicate a single leak that has penetrated directly through the first few layers, but is eventually attenuated by those non-transparent layers themselves. In such a case the pattern repeats, but becomes more faint as the roll is unwound relatively quickly.

    Realistically this is more often the case with 220 roll film which lacks a backing paper, and not 35mm film protected by its cassette. (Unless your answer to Matt's Rebel question is yes. Or you roll your own and your cassette has a leak.)

    Is any of the geometry of your camera/cassette/film system such that the above may in any way be a contributing factor?

    Ken
    "When making a portrait, my approach is quite the same as when I am portraying a rock. I do not wish to impose my personality upon the sitter, but, keeping myself open to receive reactions from his own special ego, record this with nothing added: except of course when I am working professionally, when money enters in,—then for a price, I become a liar..."

    — Edward Weston, Daybooks, Vol. II, February 2, 1932

  9. #9
    horacekenneth's Avatar
    Join Date
    Aug 2012
    Location
    MD
    Shooter
    Multi Format
    Posts
    406
    Matt, no, I'm using a Nikon F2.

    Ken, I think I understand what you're saying but I'm having a hard time picturing how it would happen to the first 12 inches of exposures inside the camera. (I'm not rolling my own) The pattern would make more sense to me if it was all one light leak that penetrates through the first couple layers of wound film. The only place that the first section of film is outer (to the rest of the film) is when it is inside the cassette. But what are the chances of having 4 or 5 rolls (in a row) from freestyle that all have the same leak?

    I'll try and get a photo up of the light leaks later.

  10. #10
    adelorenzo's Avatar
    Join Date
    Mar 2012
    Location
    Whitehorse, Yukon
    Shooter
    Medium Format
    Posts
    673
    Is it possible that this is caused be development? The beginning of the roll is on the inside of the reel maybe you are getting surges in there?



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin