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Thread: Ilford Ortho Plus film

  1. #21

    Join Date
    Apr 2012
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    southeast Idaho, Teton Valley
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    167

    Re: Ilford Ortho Plus film

    Quote Originally Posted by John Kasaian View Post
    Anyone here shoot with it?
    Opinions? Suggestions?

    I'm curious to see how this film will handle Sierra granite.
    I use Ortho Plus a lot for a project I am doing in NW Wyoming (long-term ecological changes). I use Ortho Plus to sort of match the older emulsions (mostly pre-1920, back to 1872). As others say here say, it is not quite like the blue-sensitive glass plates, and has some green sensitivity (see Ilford's data sheet). For a comparison of a familiar scene using Nathan Lane's glass plate, Ortho Plus, and FP4 Plus, see post #13478 in the landscape forum. Unfortunately, much of the rock is far away and snow-covered, but you may get some idea of the differences.

    I have other comparisons with just FP4 Plus and Ortho Plus, some showing rocks up-close. I'll post some if anyone is interested.

    https://www.largeformatphotography.i...capes/page1348

  2. #22

    Join Date
    Aug 2000
    Location
    California
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    3,111

    Re: Ilford Ortho Plus film

    Quote Originally Posted by EdWorkman View Post
    Orthochromatic film is green sensitive [in addition to blue]
    Early films, such as used by Sullivan, etc, were color blind, meaning response to blue light [only]
    The response of ortho film may be slightly modified by yellow 'ray screens'
    [which brings to mind the Martian tales of Edgar Rice Burroughs and the 'eight Barsoomian ray]
    Graduated ray screens were used to tame skies to some degree
    The 1904 Kodak catalog mentions orthochromatic sensitivity, in blurb for its new NC [non curling] film.
    Blue sensitive film continued for use for a decade or two after- it was cheaper, just as plates were cheaper than the easier to use roll films and pack films.

    Now then, I wonder if there is an available lith film which is really color blind, so that red subjects are rendered black.
    [without a red filter factor of 27 stops]
    I'm thinking a Pyro developer could tame the contrast.
    I use lith film from Freestyle, their best one, and get a nice scale from it. The biggest problem with 8x10 is the film is so thin it bows if the camera is tilted down.

  3. #23

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    Aug 2000
    Location
    California
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    3,111

    Re: Ilford Ortho Plus film

    Quote Originally Posted by Mark Crabtree View Post
    Is Ortho Plus what you are shooting, or is there something else available in continuous tone today? I've been curious about the Ilford. I've got an old box of Tri-X Ortho that still seem fine. I'm shooting Xray film in 11x14, but I'm not sure how similar that look is.
    Iuse Tri=X Ortho as well as Ilford Ortho and large quantities of single sided x-ray film.

  4. #24

    Join Date
    Mar 2002
    Location
    now in Tucson, AZ
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    2,883

    Re: Ilford Ortho Plus film

    Tri-X Ortho 4163 has been discontinued since about 1992 so finding any may be difficult. Wish I'd bought some before it was gone- like several other EK films that I never got around to using properly... Commercial 4127, Ektapan 4162, Super-XX... the list goes on.

  5. #25

    Re: Ilford Ortho Plus film

    Makiflex Ortho+ GX680 125 3.2 Acufine by Nokton48, on Flickr

    Ilford 9x12cm sheet film tray processed in Acufine
    “The secret of getting ahead is getting started.”
    ― Mark Twain

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