gphoto Posted February 29, 2008 Share Posted February 29, 2008 I've had quite a bit of time at work recently and this is what I've come upwith. It's a Compur shutter with a nikon mount stuck on the front mounted to therear plate of a Mamiya RB67 which allows me to use the RB film back. Thisprojects a circular image on the film. I made it for a fisheye but haven't foundone yet so in the mean time I've been using a 20mm. Works fantastic! Link to comment Share on other sites More sharing options...
gphoto Posted February 29, 2008 Author Share Posted February 29, 2008 Here's the first image i shot with it, there was pretty severe light leaks around the lens board which I've since patched up.<div></div> Link to comment Share on other sites More sharing options...
phule Posted February 29, 2008 Share Posted February 29, 2008 Wow, great project. Thanks for sharing Giles. I'd be curious to see more images from the camera. Link to comment Share on other sites More sharing options...
shambrick007 Posted February 29, 2008 Share Posted February 29, 2008 Pretty slick! I'd though about doing a similar thing with a Pentax 67 fisheye lens on a Speed Graphic. Link to comment Share on other sites More sharing options...
gphoto Posted February 29, 2008 Author Share Posted February 29, 2008 Rob; I'll post more when i develop them. I resealed the body to stop the light leaks and just got back from shooting it with a 14mm Tamron, should be interesting to see what that does. Sheldon; you should totally do the SpeedGraphic idea! Link to comment Share on other sites More sharing options...
gphoto Posted February 29, 2008 Author Share Posted February 29, 2008 Tried a 14mm Tamron, it has the metal lens shade on and that pretty much restricts the view to that of a 35mm frame. Bummer, guess I'll have to try something else...<div></div> Link to comment Share on other sites More sharing options...
patrick j dempsey Posted February 29, 2008 Share Posted February 29, 2008 Cool... do you still have the lens that was in the Compur? If it was a triplet, the center element can be used as a kind of teleconverter. I'm working on a similar project for Polaroid back right now. :) Link to comment Share on other sites More sharing options...
gphoto Posted March 1, 2008 Author Share Posted March 1, 2008 I still have the lens but didn't bother to see what it was. I could mount a polaroid on this one pretty easily. Upload yours when you get it going, I'd like to see what others are doing with their free time. Link to comment Share on other sites More sharing options...
patrick j dempsey Posted March 1, 2008 Share Posted March 1, 2008 Giles, I'm using part of a 105mm lens off of an old 6x9 camera. The length of the extension and the area of coverage is directly related to the distance from the lens to the shutter/center element. So the closer the lens is to the shutter, the less extension and the smaller the image circle. Hold the lens further away and the extension gets longer and the coverage gets greater. On the "ground glass" the image appears crisp and without chromatic aberration, but I'll have to do real tests with film to confirm it. If you were to do something similar, your shutter appears to be out of a 150mm or 135mm lens from a plate camera, so you can expect a pretty long snoot and a coverage somewhere near 4x5. It's gonna take me a couple weeks to get film to test it out once I'm finished but I'll be sure to publish images of the camera here when it's complete. Link to comment Share on other sites More sharing options...
gphoto Posted March 3, 2008 Author Share Posted March 3, 2008 Here's the latest shot using a Tamron 17mm f3.5 Link to comment Share on other sites More sharing options...
patrick j dempsey Posted March 4, 2008 Share Posted March 4, 2008 Awesome! Link to comment Share on other sites More sharing options...
baarlezander Posted March 21, 2008 Share Posted March 21, 2008 Really looks great! Inspiring! Link to comment Share on other sites More sharing options...
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