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Thread: foma / arista edu ultra 100 reciprocity failure

  1. #1
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    foma / arista edu ultra 100 reciprocity failure

    first of all, i'm sorry if i've posted this inquiry here. i'm not sure where to post it.
    another one, i've searched a lot about this through out the web but i'm kinda confused (too many different data's) so i wonder if i post this here i could get a clear response from pinhole users.

    here it goes..,

    anyone had tried fomapan 100 / arista edu ultra on 4x5 sheet film? just wondering how do you manage reciprocity failure when using pinhole camera. i've only shot 2 sheets of this film with my 4x5 pinhole on a sunny day, my exposure was atleast at 1-3 secs. the result was good enough the contact print i made was quite nice.

    do you guys have any reciprocity chart for foma / arista that works for you? i've downloaded a few with different datas so i'm quite confused what to use. maybe someone here got reciprocity chart that works best for them and easy to understand for a newbie pinhole user like me.

    thank you guys!

    FG
    Last edited by JefreyJacob; 11-29-2012 at 06:56 PM.

  2. #2
    Administrator Tom Persinger's Avatar
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    I found a chart that was posted by F295 member murrayatuptowngallery over on APUG that looks fairly accurate. I recall when I used to use this film the reciprocity failure was amazing. Here's what he wrote. You could send him a message via the F295 message system too.

    Foma 100 Classic
    1 1.9
    2 6.0
    3 11.6
    4 19
    5 27
    6 36
    7 46
    8 56
    9 68
    10 80
    11 93
    12 106
    13 120
    14 135
    15 150
    16 165
    17 181
    18 197
    19 213
    20 230
    21 247
    22 265
    23 282
    24 300
    25 318
    26 336
    27 355
    28 374
    29 392
    30 411
    31 430
    32 449
    33 469
    34 488
    35 507

  3. #3
    I use the following values

    0.5 s -> 0.5 s
    1 s -> 1.3 s
    1.5 s -> 2 s
    2 s -> 3.5 s
    3 s -> 6 s
    4 s -> 9 s
    6 s -> 14 s
    8 s -> 23 s
    12 s -> 37 s
    16 s -> 1 m
    24 s -> 1 m 35 s
    32 s -> 2 m 30 s
    46 s -> 4 m
    1 m -> 6 m 30 s
    1 m 30 -> 10 m 45 s
    2 m -> 17 m 15 s
    3 m -> 28 m
    4 m -> 44 m
    6 m -> 1 h 10 m
    8 m -> 1 h 45 m
    12 m -> 3 h
    16 m -> 5 h
    24 m -> 8 h
    Last edited by renon; 11-30-2012 at 03:16 PM.
    -_- Best wishes from Switzerland, René -_- my photos on flickr

  4. #4
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    thanks guys! forgot this thread already.

    @renon, where did you get that one? theres a lot of chart for foma and i'm quite confused which to use.

    thanks tom for that list i think i had that already.

  5. #5
    Jefrey,

    This is the one that I use:

    http://consumptive.org/technical/Fom...ild_Effect.pdf

    It's absolutely bang on, I find.

    Regards,
    George.
    Please click on my flickr page : www.flickr.com/photos/seoirseosial

    If a single photograph is a phrase, then a body of work is the full story.
    (Manuel Alvarez Bravo)

  6. #6
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    thank you guys!

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