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Thread: non-linear film path for constant f

  1. #21
    Brad, I've been in touch recently with some photographers who are involved in similar projects. You might be interested in seeing this video featuring ShiKai Tseng's work:
    http://vimeo.com/25503274

  2. #22
    Quote Originally Posted by steve irvine View Post
    Brad, I've been in touch recently with some photographers who are involved in similar projects. You might be interested in seeing this video featuring ShiKai Tseng's work:
    http://vimeo.com/25503274
    That was awesome!!

  3. #23
    Oh my goodness, that was a wonderful video! I've seen the liquid emulsion, but I had not considered this wonderful way of using it. What a great idea. Making a positive would be even better. Daguerreotype on a polished metal object possibly? Thanks Steve!

    Quote Originally Posted by steve irvine View Post
    Brad, I've been in touch recently with some photographers who are involved in similar projects. You might be interested in seeing this video featuring ShiKai Tseng's work:
    http://vimeo.com/25503274
    Henricus

  4. #24
    Beautiful zen-like work.
    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)

  5. #25
    Well, I completed the camera and all looked good, but film transport turns out to be a problem. The film bound after winding it past the 2nd exposure and would not budge. I will try some paper this weekend just to see if the camera itself works like I think it should. If anyone has any tips on smoothing out the film path, I'd like the input. It does have to make a couple of radical u-turns, so it just may not work.

  6. #26
    Perhaps this design from Ross Orr (the one that got me started on the pinhole path) will be helpful in thinking about how to lay out a curved plane camera - http://www.creativepro.com/files/sto...holeCamera.pdf

  7. #27
    I looked at that design a while back, but woodworking/metalworking are not really my strong suits. I don't have a shop or really anywhere to undertake such a project which is why I am just trying with the foam core. I admire those here who can make these wonderful cameras to such tight tolerances. I have more interest than ability when it comes to making things. I will re-work the design and have another go.

  8. #28
    Ok, I made some mods to the camera so that I can load paper in it. I cut some Ilford Harman Direct Positive FB Glossy to size (65x125mm) and threaded it around the guides. 1 minute exposure in morning sun out at the kiddie wading pool was what I calculated for f/217 at iso 3 (from the paper tech sheet). Then I developed in caffenol-C-L (first time using caffenol).

    Here it is:

    wading pool pinhole by James Harr Photo, on Flickr
    Last edited by JamesHarr; 01-12-2013 at 02:25 PM.

  9. #29
    Do you have a knob on the 'supply' spool to release tension...that's the trick with these curved film plane cams. Pic looks good, camera works well!

  10. #30
    Quote Originally Posted by Jimmy G View Post
    Do you have a knob on the 'supply' spool to release tension...that's the trick with these curved film plane cams. Pic looks good, camera works well!
    Yeah, I had two knobs, but it was binding anyway on the supply side. It was pretty tight, so I need to re-do that and also the spool was just sandwiched between the top and bottom panels, so there was a lot of friction too. Lessons learned to be incorporated in the CF217 MkII.

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