Pinhole Photograph with 6-month exposure

Discussion in 'Alternative Techniques & Photo Gallery' started by Dick Sanders, Jan 8, 2009.

  1. Dick Sanders

    Dick Sanders TPF Noob!

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    The spectacular picture shows each phase of the sun over Bristol's Clifton Suspension Bridge taken over a six month period. It plots the sun's daily course as it rises and falls over Brunel's famous structure, which spans the 702ft (214m) Avon Gorge.

    Incredibly, the eerie image was captured on a basic pin-hole camera made from an empty drinks can with a 0.25mm aperture and a single sheet of photographic paper.

    Photographer Justin Quinnell strapped the camera to a telephone pole overlooking the Gorge, where it was left between December 19, 2007 and June 21, 2008 - the winter and summer solstices.

    Stunning photographs of landmark captured over six-month period - Telegraph

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  2. stsinner

    stsinner TPF Noob!

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  3. windrivermaiden

    windrivermaiden TPF Noob!

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    A lovely thing to be produced with low tech.
     
  4. nrois02

    nrois02 TPF Noob!

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    did he just use a 35mm and keep it open the whole time?
     
  5. Dick Sanders

    Dick Sanders TPF Noob!

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    He used an empty soda pop can. You can pretty much make a pinhole camera from anything, including your house. I read once about a guy who turned his VW bus into a pinhole camera. You've heard about kids using oatmeal boxes. I made one from an 8 inch square cardboard box sprayed flat black inside and with a small nail hole in the front covered in black tape. I curved a sheet of 8x10 film against the inside back, sealed up the box, then went outside and pulled the black tape for half a minute. The picture came out -- although it was crude. I called it the "birth of photography." One thing for sure, pinhole photography is really fun. You can learn a lot about it here:

    Welcome to the Pinhole Resource
     
  6. Sw1tchFX

    Sw1tchFX TPF Noob!

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    wow, that's really spectacular to be able to get that kind of an exposure!
     
  7. Sachphotography

    Sachphotography TPF Noob!

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  8. liltimmy1313

    liltimmy1313 TPF Noob!

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    That really is an incredible shot, it almost seems more like a science experiment than anything else.
     
  9. christopher walrath

    christopher walrath No longer a newbie, moving up!

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    To an extent, it is. It would be problematic figuring out keeping the scene from being over exposed over a half-year period. But Justin stuck it, didn't he?
     
  10. Actor

    Actor TPF Noob!

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    The pinhole was 0.25 mm in diameter. A soda can is about 120mm high so his aperture would be f/480.

    3600 sec/hr * 24 hr/day * 180 day/half year = 15,552,000 sec. Round that to 16,000,000 sec

    By the sunny 16 rule film speed should equal shutter speed so he needed an ASA 1/16,000,000 if his aperture was f/16. But his aperture was f/480, approximately 5 stops smaller. His film's speed needs to be 5 stops faster than ASA 1/16,000,000 or approximately ASA 32/16,000,000 = ASA 1/500,000 = ASA 0.000002. If he were using ASA 100 film then he needed a neutral density filter with about 22 stops attenuation.
     
    Last edited: Oct 14, 2009
  11. ClickyPicky

    ClickyPicky TPF Noob!

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    That is so cool - I have always wanted to give pinhole photography a go for the fun of it.
     
  12. AfroKen

    AfroKen TPF Noob!

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    Fascinating! Thanks for the link!!!!!
     

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