quality DX-coded Infrared film?

Discussion in '35mm Cameras' started by Chris, Apr 11, 2004.

  1. Chris

    Chris Guest

    Can anyone recommend a good I/R 35mm film with DX-coding?

    Chris, Apr 11, 2004
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  2. I am not all that well informed about I/R, but as I recall many years
    ago when I looked at it, film speed was not really very useful.
    Experimentation was needed. The spectrum sensitivity of meters is designed
    to fit visible light. The meters did not provide predictable accurate
    metering. If my memory is correct (it is from pre DX days) I don't see
    where DX coding would be of much use, unless things have changed.
    Joseph Meehan, Apr 12, 2004
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  3. Chris

    Chris Guest

    The camera I want to experiment with requires film in DX coding, otherwise
    it'll read as ISO 100 by default.

    Chris, Apr 12, 2004
  4. Chris

    Skip M Guest

    AFAIKA, there are no true IR films with DX coding, since your exposure will
    vary due to conditions and use. The closest thing I know to IR with DX
    coding is Ilford SFX, a near IR film, and I believe Konica makes one, too,
    but I can't remember the designation. What camera are you using? If you
    are shooting IR, or near IR film, you'll need to use a red filter, a 25 red
    is the weakest that will show any effects, the deeper red, the better the
    effect. But if you can't attach a filter, IR is pretty useless. If you are
    using an SLR, generally you can select the ISO, and override the default.
    But ISO 100 is a fair starting place, anyway. 50 is better, though.
    Skip M, Apr 12, 2004
  5. Chris

    columbotrek Guest

    Like another poster said, your meter will not be reliable for IR film.
    So ISO 100 is meaningless. You need to place the camera in manual and
    refer to the films data sheet for starting exposures. Then bracket a
    lot. I have been kicking around the idea of using my Olympus 2020
    digicam as an IR exposure meter. I have a suitable Range Finder film
    camera, filter, and a roll of Kodak HIE in my fridge. I am waiting for
    a good IR kind of day to go out. My idea is to record the exposure
    reading with the digicam then run a series of exposures with the film
    camera using the same IR filter. Then compare what I got. I hope to
    get a "calibrated" IR meter as I will know what the compensation will be
    for next time. Thats the great hope anyway.
    columbotrek, Apr 12, 2004
  6. Chris

    Chris Guest

    The Minolta 3000i won't let you override the ISO. It's 32 to 3200 DX-coded,
    or 100 if it's not DX. I checked, and there's no I/R LED in the film
    compartment to expose the bottom portion of the film inadvertently, so I'd
    like to give it a try sometime, just not sure if it'd be a good idea.
    Chris, Apr 12, 2004
  7. Chris

    Skip M Guest

    I'll be danged, never heard of an SLR that didn't let you set ISO. Well, I
    did say "generally." Hmmmph, "From the Mind of Minolta..."
    Skip M, Apr 12, 2004
  8. Interesting. Does it allow for manual exposure?
    Joseph Meehan, Apr 12, 2004
  9. Chris

    Nick Zentena Guest

    Does it let you set the shutter speed and aperture? Does it give you
    exposure compensation? I've got one camera that needs DX. If you want to use
    the in camera meter you just use exposure compensation. 50 is -1 one stop.
    25 is -2 stops. If you don't need the in camera meter and you can set the
    camera in manual mode then just ignore the meter.

    DX stickers used to exist but I doubt they are available in the speed you
    need. I wonder if you could print your own DX sticker?

    Nick Zentena, Apr 12, 2004
  10. Chris

    Jim Phelps Guest


    This may not be an answer to your question, but may be a solution to your
    problem. Look at the following link:


    These are DX labels that you can add to any canister (with or without DX
    coding, just cover over the existing DX info with the label)

    ISO starts at 40.

    Jim Phelps, Apr 12, 2004
  11. Chris

    Chris Guest

    Nope. Glorified P&S. Failing finding DX-coded I/R, will I get much at ISO
    Chris, Apr 12, 2004
  12. I/R is 60% trial and error. I don't know what you will get. Don't
    forget the proper filter as indicated by the film.
    Joseph Meehan, Apr 12, 2004
  13. Chris

    Chris Guest

    You can't do anything manually except focus on a 3000i. The rest is

    It's one of those "intelligent" cams like the 7000i, but costs alot less.
    No AF illuminator, but got one on the dedicated flash I picked up. No
    manual shutter or aperture. It determines on it's own what shutter speed is
    best. Shutter of 1/1000th to 4 seconds. Just barely effective for night
    shots. It was a cheap date. ;-)
    Chris, Apr 12, 2004
  14. Chris

    Chris Guest

    The manual suggests that the camera cannot read the film speed if it's not
    in DX. I can't see how a sticker is going to help.
    Chris, Apr 12, 2004
  15. Chris

    Alan Browne Guest

    er, setting the ISO to a lower number increases the exposure to the film
    (it is less sensitive, needs more exposure). So +1 and +2 above.
    Alan Browne, Apr 12, 2004
  16. Chris

    Nick Zentena Guest

    You might want to pickup a cheap fully manual camera. Some aren't selling
    for much more then getting a roll of IR film processed. Have you considered

    Scroll down to the section on Maco


    Supposedly 100 ISO.

    Nick Zentena, Apr 12, 2004
  17. Chris

    Jim Phelps Guest

    The sticker uses metallic foils and insulators to create the electric paths
    to tell the camera what the ISO should be. It works. If you knew the DX
    pattern (Google???) you could use aluminum foil and electrical tape to
    create the pattern yourself. I suggest you look at the link and read the

    Jim Phelps, Apr 12, 2004
  18. Chris

    Chris Guest

    Haven't settled on processing yet. But my very next purchase will be a
    less-than-cheap fully manual camera. ;-) I was just toying with the idea
    of trying I/R in this autofocus, as it doesn't appear to have the I/R LED
    drawbacks I've heard about.
    I'm in the US.
    Chris, Apr 12, 2004
  19. Chris

    Nick Zentena Guest

    Don't worry they won't check your passport when you read the info on the
    webpage-) The Maco film is sold in the US and seems to fill your
    requirements. DX coded. 100 ISO so even if it wasn't DX coded it would be

    Nick Zentena, Apr 12, 2004
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