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Thread: HMI or strobe for wetplate/paper negs/low iso

  1. #21

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    Re: HMI or strobe for wetplate/paper negs/low iso

    Quote Originally Posted by jnantz View Post
    it has nothing to do with control and ratios between ambient light and other light sources and yes
    having done commercial assignment work since the 80s i am well versed in that, but its fake/ an illusion like everything else.

    Are you nuts?

    Basing an exposure with supplemental lighting to properly expose the subject and the background is not fake or an illusion. Nor is basing the exposure so the background goes darker or lighter then the subject fake or an illusion. It is control!

    hi cdavis324

    when i make a portrait or use a camera
    that i can control the shutter speed, i do my best to
    make long exposures rather than short ones. IDK... i find
    strobe+flashbulb work, instantaneous images &c to be just a veneer
    not really what i want to photograph.
    i'd rather show things breathing ..
    if you poke around newtonian physics a little bit
    you know that every object is in motion
    i'd rather show things as they are .. alive, in motion, not static
    some love it, but to me static/instantaneous,
    like sharp modern lenses its all too clinical ...
    with regards the the exact shutter speed
    it depends sometimes i count to 4 or 10 slowly and sometimes a little faster.
    ( i've taken 45 second portraits before ) sorry if i skirted your question ...
    my advice with your slow film / paper or whatever you are using
    is still available light wide open or 1-2 stops closed down
    ( or if you have a junque f 5.6 / 6 RR put it on ) and a (softboxed )
    hot light fill if you need it, bulb/time and count to 5-6... bracket a little bit to get used to it...
    then use a slow working developer like caffenolc with a splash of print developer in it
    and see how you like your negatives
    you might like life in the slow lane.. i try to take backroads as much as i can

    good luck !
    john

    ps my post was not to slight anyone who likes instantaneous portraits/photography,
    sharp modern lenses, fresh film and d76 &c &c. i hope people who do that sort of thing
    have a blast, and enjoy themselves to the fullest
    and it helps them get to where they want to be at...
    (YMMV )

  2. #22
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    Re: HMI or strobe for wetplate/paper negs/low iso

    Quote Originally Posted by Bob Salomon View Post
    Are you nuts?

    Basing an exposure with supplemental lighting to properly expose the subject and the background is not fake or an illusion. Nor is basing the exposure so the background goes darker or lighter then the subject fake or an illusion. It is control!
    i could ask the same of you LOL !
    i guess a veneer / instantaneous sliver of time
    doesn't look fake to you,
    but to me, it looks about as fake as it gets

    yes, its ALL an illusion, made up, staging, direction, misdirection, theatre, manipulated &c

    have a great day !
    Last edited by jnantz; 9-Jan-2019 at 10:56.
    enjoy your coffee

  3. #23

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    Re: HMI or strobe for wetplate/paper negs/low iso

    Quote Originally Posted by jnantz View Post
    i could ask the same of you LOL !
    i guess a veneer / instantaneous sliver of time
    doesn't look fake to you,
    but to me, it looks about as fake as it gets

    yes, its ALL an illusion, made up, staging, direction, misdirection, theatre, manipulated &c

    have a great day !
    Your slow exposure is just as much made of lies and a complete fake as a shot made with strobes and nothing else. You're barking up the wrong semantic tree.

  4. #24

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    Re: HMI or strobe for wetplate/paper negs/low iso

    In reference to original question, I am wondering how the color shift during warm up would effect wet plate. As I understand it, wet plate has extended UV sensitivity, and it occurs to me that there might be a duration during the warm up curve that not as much UV light is being emitted. This isn’t really a problem, just a consideration as the HMIs I worked with in college could take anywhere from a couple of minutes to 20 minutes to fully warm up in the visible spectrum. I wonder what the experience would be like if I could see on UV, does the UV out put warm up at the same rate? Perhaps someone here has experience using HMIs with wet plate? I think that’s what the OP is looking for.

  5. #25
    Jac@stafford.net's Avatar
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    Re: HMI or strobe for wetplate/paper negs/low iso

    Answer: flash bulbs.
    .

  6. #26

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    Re: HMI or strobe for wetplate/paper negs/low iso

    Quote Originally Posted by Graeme Hamilton View Post
    In reference to original question, I am wondering how the color shift during warm up would effect wet plate. As I understand it, wet plate has extended UV sensitivity, and it occurs to me that there might be a duration during the warm up curve that not as much UV light is being emitted. This isn’t really a problem, just a consideration as the HMIs I worked with in college could take anywhere from a couple of minutes to 20 minutes to fully warm up in the visible spectrum. I wonder what the experience would be like if I could see on UV, does the UV out put warm up at the same rate? Perhaps someone here has experience using HMIs with wet plate? I think that’s what the OP is looking for.
    The amount of UV sensitivity wet plate has depends on the salts you use but the UV response is never what I would call significant. It's a common misconception. If you look at the work Lund has done to quantify the spectral response of collodion, you'll see that all the salts (iodides, bromides, lithides) produce mostly violet sensitivity. Depending on the salts used, some combos have violet plus blue and a bit of green sensitivity and some combos had violet response plus a VERY VERY near UV and a touch of blue. None had extended UV response. I suspect that the myth that collodion is mostly UV-sensitive arose because the printing methods that go along with wet plate negatives are UV-only and, being massively orthochromatic, wet plate such a "different than normal" look to it that people assume or are willing to believe that it sees only UV.

    FWIW, I am using modern strobes to shoot my plates and they turn out well:


    20181230-1.jpg by Ty Williams, on Flickr

  7. #27

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    Re: HMI or strobe for wetplate/paper negs/low iso

    Nice going Ty you've captured the subject as she gives something of herself to you. i've found the prior techno BS entertaining but this at least i think is the proper end result regardless of how you got there.

    j

  8. #28
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    Re: HMI or strobe for wetplate/paper negs/low iso

    Quote Originally Posted by joem View Post
    Nice going Ty you've captured the subject as she gives something of herself to you. i've found the prior techno BS entertaining but this at least i think is the proper end result regardless of how you got there.

    j

    true, but 99% of photography is techno BS
    most of the commentary on photography websites
    is gear and tech related, not sure how anyone
    can escape the 99%

    OP best of luck with your project!
    enjoy your coffee

  9. #29

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    Re: HMI or strobe for wetplate/paper negs/low iso

    Quote Originally Posted by jnantz View Post
    true, but 99% of photography is techno BS
    most of the commentary on photography websites
    is gear and tech related, not sure how anyone
    can escape the 99%

    OP best of luck with your project!
    Thanks! And appreciate you sharing your experience with shooting continuous light... I understand that stobe is what's usually used, but am interested in experiences of others who have used hmi's or other continuous light at high power and low shutter speeds.

    And I'm pretty well versed in strobes and what they can do, so to reiterate interested in continuous! Or comparisons to strobe at the least!



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