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  1. #31

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    Another example

    Hello all,

    Here is an example of a image I posted some month ago onto the gallery :

    http://www.apug.org/gallery1/showima...mageuser=14168

    It's 4x5" transparency film exposed with 23mm focal length !

    I have used too a 16mm FL pinhole camera, with B&W large format film, if someone interested I can post an image of the result here (I have yet to scan it).

    Regards,

    Raphael

  2. #32
    Marco B's Avatar
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    Quote Originally Posted by Mal View Post
    Look up www.zeroimage.com and find the link on the left to Zero 45. There is a specifications sheet that lists the pinhole sizes and dimensions at 25mm, 50mm and 75mm equivalents. It may not be exactly what you are looking for but it will give you a start...
    Quote Originally Posted by BetterSense View Post
    What I figure, is that I know Tmax can take many stops of overexposure without changing tonality too much, because it has so much straight-line. So I figure that if I expose enough that the corners get enough exposure, I will hopefully be able to dodge back the center and have it look at least somewhat normal tonality from the center outwards, if I can get the dodging right.
    Have a look at my Zero Image 4x5 pinhole images in 25 mm configuration (probably a 110-120 degree super wide angle). Instead of dodging, you need to burn in the center, or dodge the edges .

    http://www.boeringa.demon.nl/amsterd...ght/index.html
    http://www.boeringa.demon.nl/amsterd...day/index.html

    My procedure for printing:

    - First an overall hard grade short exposure, e.g. grade 3.5-4(5) for maybe 2.5-4 seconds max. This will ensure proper contrast in the corners / edges of the print, where the negative is extremely "thin"

    - Than burn in the centre of the print using a grade 2-2.5 for maybe 15-25 seconds (exact centre may need more), using a paper with a hole cut in it of about 5 cm diameter, and continuously move it up/down vertically above the paper, hence giving the real center the most exposure, and to the edges gradually less. I do go as far as giving the edges an occasional small exposure in this step as well, when the paper with hole is the utmost highest position, but keep exposing the edges to a minimum.

    Here is one image:

    Click image for larger version. 

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    As you can see, a 25 mm pinhole with a 4x5 negative is perfectly feasible...
    My website

    "The nineteenth century began by believing that what was reasonable was true, and it wound up by believing that what it saw a photograph of, was true." - William M. Ivins Jr.

    "I don't know, maybe we should disinvent color, and we could just shoot Black & White." - David Burnett in 1978

    "Analog is chemistry + physics, digital is physics + math, which ones did you like most?"

  3. #33

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    I have a 25mm 4x5 pinhole camera. It covers to the edges, but the vignetting is very noticable. Not a bad thing for a lot of stuff. I don't remember the diameter of pinhole I'm using, but it is on very thin stock. I think it might have been around 0.15mm. Very small.

    I have a couple of shots from it:
    http://visualfiction.org/zenphoto/al...all-img001.jpg
    http://visualfiction.org/zenphoto/al...sml-img019.jpg
    http://visualfiction.org/zenphoto/al...sml-img021.jpg

    The waterfall (first one) was taken right at the base of this waterfall. I mean pretty much right at the base. A more normal perspective shows how dramatic the wide angle is.
    http://visualfiction.org/zenphoto/al...all-img004.jpg

    (I actually scanned this with the film upside down so it is mirrored; I didn't notice before and didn't flip it):

    It is ridiculously wide. When you think about it, 25mm is a pretty wide angle lens on a 35mm camera.. nevermind 4x5!

    It's so wide that I still haven't come to terms with it and figured out how to frame things in an expected way. Even using diagonal lines I drew on the box top I still underestimate how wide my images will be.
    The universe is a haunted house. -Coil
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  4. #34
    Marco B's Avatar
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    Quote Originally Posted by walter23 View Post
    It's so wide that I still haven't come to terms with it and figured out how to frame things in an expected way. Even using diagonal lines I drew on the box top I still underestimate how wide my images will be.
    I know the feeling. You really need to force yourself to go right up to the subject with a 25mm 4x5 LF pinhole. And with that I mean sometimes in the range of 10-25cm max.

    Here is another extreme example of making maximum use of the extreme wide angle. I don't think I have to explain to you how close I set up the camera to the pump... it literally rested against the stone masonry:

    Click image for larger version. 

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    My website

    "The nineteenth century began by believing that what was reasonable was true, and it wound up by believing that what it saw a photograph of, was true." - William M. Ivins Jr.

    "I don't know, maybe we should disinvent color, and we could just shoot Black & White." - David Burnett in 1978

    "Analog is chemistry + physics, digital is physics + math, which ones did you like most?"

  5. #35
    glbeas's Avatar
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    Anybody ever try to make a non image neg from the pinhole camera aimed at an evenly lit blank wall and developed to just the right contrast and density then sandwich that with a neg for printing to automatically dodge the print? It would be a custom job for each camera and focal length used.
    Gary Beasley

  6. #36

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    Quote Originally Posted by Marco B View Post
    I know the feeling. You really need to force yourself to go right up to the subject with a 25mm 4x5 LF pinhole. And with that I mean sometimes in the range of 10-25cm max.

    Here is another extreme example of making maximum use of the extreme wide angle. I don't think I have to explain to you how close I set up the camera to the pump... it literally rested against the stone masonry:
    That's a great image. Sometimes I think I must have placed my camera ridiculously far away from something, and then I catch a detail like the bricks in your image... that spout is like a brick's width away from the camera. Maybe two.
    The universe is a haunted house. -Coil
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  7. #37

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    Quote Originally Posted by glbeas View Post
    Anybody ever try to make a non image neg from the pinhole camera aimed at an evenly lit blank wall and developed to just the right contrast and density then sandwich that with a neg for printing to automatically dodge the print? It would be a custom job for each camera and focal length used.
    I just read about that yesterday. I think you have to make a contact positive for it to work first; or shoot transparency film.
    The universe is a haunted house. -Coil
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  8. #38
    glbeas's Avatar
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    Right, thats they way it works. A contact positive would be best. The neg would work better placed in front of the neg somehow to act as a center ND filter.
    Gary Beasley

  9. #39
    Mark Fisher's Avatar
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    If you really want the widest angle, you could curve the film 360 inside a can and have the pinhole in the end. More than a touch of distortion and light fall off, though...(: Or take a round flat tin (cookie tin) and put a smaller cylinder inside and use multiple pinholes. I've never done either of these, but they are on my to-do list!

  10. #40
    Marco B's Avatar
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    Quote Originally Posted by Mark Fisher View Post
    If you really want the widest angle, you could curve the film 360 inside a can and have the pinhole in the end. More than a touch of distortion and light fall off, though...(:
    William Mokrynski's "Endroit de vie" series is a nice example of the bizarre results such a pinhole camera creates:

    http://www.wmokrynski.com/flash_page...e_gallery.html

    Marco
    My website

    "The nineteenth century began by believing that what was reasonable was true, and it wound up by believing that what it saw a photograph of, was true." - William M. Ivins Jr.

    "I don't know, maybe we should disinvent color, and we could just shoot Black & White." - David Burnett in 1978

    "Analog is chemistry + physics, digital is physics + math, which ones did you like most?"

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