DIY Large Format Slide Projector (LF 8x10)

Discussion in 'Large Format Cameras and Accessories' started by Zarraboy, Jan 10, 2011.

  1. Zarraboy

    Zarraboy Member

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    I´m looking for some plans to build a simple LF projector myself, no need for big magnification, maybe 2x1 on a white wall. Couldn´t find any ideas or plans on the net. Any help somebody?
     
  2. jp498

    jp498 Member

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    perhaps start with one of the classroom style overhead projectors; should be able to get those at yard sales for next to nothing. A black hood around 3 sides of it should increase the contrast quite a bit.
     
  3. Existing Light

    Existing Light Member

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    I've wondered the same thing myself. I projected some 35mm slides in my Besseler. If you have an LF enlarger, that might be the simplest thing. In my case, I have to keep the lights off (or at least very dim), so that could be a problem if people are going to be walking around.

    I've wondered if it would be possible to attach a light source (and most likely a fan) to the back of an LF camera, make some sort of holder for the slide, and project an LF slide like that. Of course this is just thinking on my part and assuming it could be done with simple tools any handyman would have in his garage. Something like this might be harder and more expensive than I'm thinking. MAybe I'll give it a try if I ever have a spare LF camera :D
     
  4. Mark Fisher

    Mark Fisher Subscriber

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    It would seem to me that the easiest way would be to rig up something with your camera. If you took out the GG, make a "slide holder" to slip in where the film holder would go, and make a big light box for the back, you'd be pretty much there. I would think the hard part would be the light source. I suspect you'd need some serious light back there without too much heat. Besides how cool would it be to project the image back out of the camera!
     
  5. Existing Light

    Existing Light Member

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    Perhaps LED or even CF bulbs would take care of the heat problem. I've seen LED bulbs that replace 75 watt incandescant and CF bulbs that are as bright as 300 watt bulbs, but those 300 watt replacements are pretty big. The size of the back of the camera might limit the size of the light source (in length x width), so the brighter CF bulbs might be the only option for smaller LF cameras, even if you made a penel with multiple bulbs.

    This is all me assuming the rig in my head would actually work. I did build a slide projector out of plywood and an enlarger lens and lensboard, so I could possibly rig up a simple light source with a similar construction for a DIY projector if I had the time, which I unfortunatly dont right now.
     
  6. Zarraboy

    Zarraboy Member

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    I have a 5x7 LF camera to spare for this project. What kind of projection lens would be likely to work with the idea above? I also have a 35mm T. ANGENIEUX cinema lens lying somewhere in my basement...
     
  7. holmburgers

    holmburgers Member

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    Stanley Kubrick had to make an 8x10" enlarger to shoot the primate scenes in 2001: A Space Odyssey. Check it out, pretty awesome read!

    http://www.visual-memory.co.uk/sk/2001a/page2.html

    and a bit more from photo.net

    http://www.largeformatphotography.info/forum/showthread.php?t=57919

    (side note, the guy asking this question on this link, Thomas Birke, is an awesome LF photographer whose work you can find on flickr.com... oh shoot, I'll just show you -> http://www.flickr.com/photos/move_lachine/3511703292/)
     
  8. John Koehrer

    John Koehrer Subscriber

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    I doubt very much that you're going to find a decent light source to use with a camera.
    You're going to need a projection lens or at least a lens fast enough that you won't need 500-1000 W.
    IMO The overhead projector holds the most promise,