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  1. #1

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    Solargraph with a Brownie 2A?

    I'm thinking about putting up some solargraph cameras. Could I use my Kodak Brownie 2A instead of making a shoebox pinhole camera? Then I already have a light-tight box (with some tinfoil over the red window). Or could I risk gathering so much light that I would set fire to the photo paper (and camera, and house) instead of getting a picture?

  2. #2

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    I'm sure that you'd burn the paper.
    And, for solargraphs, you need a very long exposure, an aperture larger than a pinhole would not allow this without over-exposure.

  3. #3

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    I'm pretty sure you won't start a fire---I've done multi-hour exposures of this type with conventional cameras, on hot sunny days, without a problem. That said, it might be prudent to start at a time when you can be around for the first day, so that if anything *does* go awry you're there to react to it.

    -NT
    Nathan Tenny
    San Diego, CA, USA

    The lady of the house has to be a pretty swell sort of person to put up with the annoyance of a photographer.
    -The Little Technical Library, _Developing, Printing, And Enlarging_

  4. #4

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    i'd be careful
    i know of someone who burned his
    speed graphic with the shutter on B
    and the camera on the roof of his car ...

    if you use a lens'ed camera
    it doesn't take a long time to get a retina image ...
    ( a photograph of "something" on the paper long exposure )
    so i can't imagine how you would do this pointing at the sun
    unless you make your own pinhole aperture and put it infront
    of the lens to created a pinhole'd lens'd image ...

  5. #5

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    I didn't think you could "overexpose" a solargraph, seeing as they're done with anything form one day to six months' overexposure. I'll try a day-long exposure a day I'm at home and see how it works.

    jnanian: A pinhole in front of the lens would just obscure the field of view.
    Last edited by Arctic amateur; 10-17-2013 at 07:02 AM. Click to view previous post history.

  6. #6

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    Quote Originally Posted by Arctic amateur View Post
    I didn't think you could "overexpose" a solargraph, seeing as they're done with anything form one day to six months' overexposure. I'll try a day-long exposure a day I'm at home and see how it works.

    jnanian: A pinhole in front of the lens would just obscure the field of view.
    solargraphs are usually done with a pinhole camera, not usually a camera with a lens ...
    although i have heard of someone making solargraphs with old POP paper and an 8x10 camera with a lens ..

    i'm not sure how a pinhole infront of a lens would it obscure the field of view at all ...

    it seems like it would be like making your own "waterhouse stops" ... and a brownie 2a
    uses a meniscus lens, and its aperture/s are infront of the lens cell ...
    otherwise your exposures with regular developing out paper will be very short .... ( as compared to months )

    have fun with your tests
    Last edited by jnanian; 10-17-2013 at 08:28 AM. Click to view previous post history.

  7. #7
    bvy
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    I've made solargraphs with a homemade lens camera -- a fresnel lens fitted into a cigar box. The box is four inches deep, and the lens is fixed at roughly f/8. I used Ilford MG paper. But these were (relatively) short exposures, usually made in the course of an afternoon. The results, I thought, were worthwhile. I can post something later if there's interest.

  8. #8

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    Quote Originally Posted by jnanian View Post
    i'd be careful
    i know of someone who burned his
    speed graphic with the shutter on B
    and the camera on the roof of his car ...
    Wow! Another reason to prefer the metal Graphics. :-)

    if you use a lens'ed camera
    it doesn't take a long time to get a retina image ...
    ( a photograph of "something" on the paper long exposure )
    so i can't imagine how you would do this pointing at the sun
    unless you make your own pinhole aperture and put it infront
    of the lens to created a pinhole'd lens'd image ...
    I dunno---under your influence, I did once take an afternoon's exposure to make a sunprint that turned out to have the track of the sun in the image. It didn't really cause much bleed outside its track, so I wouldn't be surprised to find that a multi-day version would have several parallel tracks like we're used to seeing in pinhole solargraphs.

    I don't remember what aperture I used, but I think the lens in question only goes down to f/32, so it certainly wasn't pinholesque.

    Disclaimer: I am not advocating anything, all performers are trained professionals or pretending to be, don't try this or anything else at home, and please don't set your camera, car, spouse, or hair on fire.

    -NT
    Nathan Tenny
    San Diego, CA, USA

    The lady of the house has to be a pretty swell sort of person to put up with the annoyance of a photographer.
    -The Little Technical Library, _Developing, Printing, And Enlarging_

  9. #9

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    if there was some sun out today, i would gladly set up a brownie 1a and something else up
    and see what happens .. its too crummy out gloomy and looks like rain

    sounds like fun nathan!
    under my influence hehe, hope you didn't get arrested afterwards
    or your hair on end, like you you had your hand in a plug or on a van der graph generator !

    i think it was domenico foschi who burned up his speeder ... i tried to find the thread where he described he tale of woe
    ( but came up empty )

    john

  10. #10
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    A few weeks ago I left out a big cardboard box camera with a piece of color photo paper in it.... I was trying to make a "retina print". It was out for around 8 or 9 hours and I didn't mean to but I got a sun streak on the paper. I agree with NT, over the course of a week or so you could probably get multiple sun trails.... the paper I was using is slow slow slow... it took three days to reach max dark grey sitting on my desk!

    But I would worry very much about starting a fire and it might not be good enough to see that a fire doesn't start in a day or two... like leaving a magnifying glass in your window aimed at a piece of paper and hoping that it doesn't catch your house on fire... you might not want to feel safe just because a fire didn't start in the first day or two!

    I agree with John that a pinhole over the lens is a good idea and it will not affect your coverage. The result will be like a "sharper pinhole" and you won't have to worry about burning down your house!

    Have fun!



 

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