Utilizing the full coverage of 35mm lenses

Discussion in '35mm Cameras and Accessories' started by holmburgers, Jun 22, 2010.

  1. holmburgers

    holmburgers Member

    Messages:
    4,423
    Joined:
    Aug 13, 2009
    Location:
    Rochester NY
    Shooter:
    Multi Format
    So sometimes when I'm bored I take my lenses and hold them next to the wall and project an image of my room on the wall. Do this with a 35mm lens (format, not focal length) and you realize how much coverage these lenses have that we don't use. Granted it's probably less well corrected in the outer reaches, but still, it would be cool to utilize it.

    One idea was to somehow mount it on a MF camera and record the whole image circle of 120 film. However, is there a MF camera out there that would have a short enough focal flange distance to achieve this? Me thinks not.

    What about modifying a SLR or rangefinder? One could cut out all baffles and either modify the winding distance or just shoot one shot w/ a lens cap on and wind it twice as far. You could get a panoramic format this way.

    I don't know; call it pointlesss, silly, fool hardy, daydreaming, wasting time at work, BUT I WANT TO DO IT! Or at the very least, see it.
     
  2. Ian Grant

    Ian Grant Subscriber

    Messages:
    18,032
    Joined:
    Aug 2, 2004
    Location:
    West Midland
    Shooter:
    Multi Format
    I can do that with my Quarter plate camera, just need to rig a shutter :D

    But I have a few candidates.

    Ian
     
    Last edited by a moderator: Jun 22, 2010
  3. Rol_Lei Nut

    Rol_Lei Nut Member

    Messages:
    1,118
    Joined:
    Jul 2, 2006
    Location:
    Hamburg
    Shooter:
    Multi Format
    I did that kind of thing in the past, but didn't find the coverage that much greater...
    Certainly not enough to tempt me to try to adapt those lenses to a 6x6 SLR.
     
  4. PhotoJim

    PhotoJim Member

    Messages:
    2,223
    Joined:
    Oct 9, 2005
    Location:
    Regina, SK,
    Shooter:
    Multi Format
    It would be easiest on a large format camera. And you're right, the periphery won't be very well corrected at all. In many cases coverage is just a little larger than what is required for a 24x36mm frame.
     
  5. urbanvelocity

    urbanvelocity Member

    Messages:
    22
    Joined:
    May 28, 2010
    Location:
    Vancouver Is
    Shooter:
    Multi Format
    how about building a camera obscura with the room? create a mount out of a thin board and place it in the window. Black out the reset of the room and mount the film/paper on the other side of the wall. create a shutter of somekind and see what you can do. I have always wanted to try as a pin hole but have not had the right view or the rooms were too big. I know someone who did something similar with a hatchback car.
     
  6. holmburgers

    holmburgers Member

    Messages:
    4,423
    Joined:
    Aug 13, 2009
    Location:
    Rochester NY
    Shooter:
    Multi Format
    From what I remember, it seemed to be about a 2 inch diameter circle. I'll check again and I'd be curious if it varies depending on the focal length.

    Yeah, shutters are the trick. Not being well corrected might be kind of cool; an interesting portrait lens or something.

    As for mounting it on an LF camera, I fear that the flange focal distance couldn't be short enough.

    And on the topic of camera obscura, I did that in my darkroom by cutting a circle out of foil tape that I had used to black out the windows. It was awesome, and great for long exposure pictures inside the room. However, not sure what this has to do with any lenses :wink:
     
  7. ic-racer

    ic-racer Member

    Messages:
    7,470
    Joined:
    Feb 25, 2007
    Location:
    Midwest USA
    Shooter:
    Multi Format
    I have thought of a similar project. Putting C-mount and D-mount cine lenses on some Leica adapter to use on a Zorki or other inexpensive focal plane 35mm camera. To get a circular wide angle image. (focal length 5.5mm to 25mm)
     
  8. frobozz

    frobozz Subscriber

    Messages:
    1,362
    Joined:
    Feb 19, 2010
    Location:
    Mundelein, I
    Shooter:
    35mm
    A while back, for totally different reasons, I cobbled up a Canon FD mount for my 4x5 camera - it was pretty heavily recessed to get the flange distance correct. I used the base of an existing recessed lens board along with a big PVC plumbing pipe cap and some miscellaneous hardware...

    [​IMG]

    For a shutter I used the lens cap! (Obviously stopping down a lot to get the exposure times out to where that was possible.)

    Some results...with the to-scale 35mm image frame superimposed...

    24/1.4 Aspherical:

    [​IMG]


    24/2.8:

    [​IMG]


    85/1.2 Aspherical:

    [​IMG]


    200/2.8:

    [​IMG]


    As you can see, not a whole bunch of extra image circle to work with... and my recollection was the edges were more of a mess wide open but to really test that I'd need to get a proper shutter involved somehow. It was my intent to do this for all my FD lenses but there are so many of them, and this was a fair bit of work, and I wasn't really sure what the point was once I'd seen the results of the first few. But if someone wants to see the results from some other FD lenses that I have (which is most of them) I still have the rig and would be happy to give it a shot.

    For anyone else that wants to try this, say with some other brand of lens, you just need to get a disassemble-able recessed lensboard (a lot of them seem to be this way so you can switch between recessed or protruding), an appropriately-sized PVC pipe cap, and a spare lens mount. I got my lens mount by finding a wrecked T-50 for $5 on That Auction Site and taking it apart. Your mileage may vary on other brands, but this was pretty straightforward on a Canon.

    Duncan
     
    Last edited by a moderator: Jun 22, 2010
  9. urbanvelocity

    urbanvelocity Member

    Messages:
    22
    Joined:
    May 28, 2010
    Location:
    Vancouver Is
    Shooter:
    Multi Format
    I was thinking of using the lens instead of just a hole. :smile:
     
  10. darinwc

    darinwc Subscriber

    Messages:
    2,448
    Joined:
    Dec 14, 2003
    Location:
    Sacramento,
    Shooter:
    Multi Format
    I've fancied this myself.
    Does anyone know which 35mm lenses have extra coverage?
    Anything that covers a little more than a 35mm neg could be useful.
    35mm pano, 645, 6x6, all of which would be fun to mess with.
     
  11. darinwc

    darinwc Subscriber

    Messages:
    2,448
    Joined:
    Dec 14, 2003
    Location:
    Sacramento,
    Shooter:
    Multi Format
    For the lens mount, just use a 5mm extention ring or adapter.. no need to canibalize a camera.
     
  12. frobozz

    frobozz Subscriber

    Messages:
    1,362
    Joined:
    Feb 19, 2010
    Location:
    Mundelein, I
    Shooter:
    35mm
    In my case, a parts camera was much cheaper than a 5mm extension ring! As a bonus, it already comes with mounting holes in a flange :smile:

    Duncan
     
  13. dynachrome

    dynachrome Member

    Messages:
    1,001
    Joined:
    Sep 16, 2006
    Shooter:
    35mm
    I never tested it but I'm pretty sure my 35mm f/2.8 PC Nikkor has a larger image circle than my 35mm f/2 Nikkor O. If you like to use more of the image circle, why not make round prints?
     
  14. darinwc

    darinwc Subscriber

    Messages:
    2,448
    Joined:
    Dec 14, 2003
    Location:
    Sacramento,
    Shooter:
    Multi Format
    All of the PC lenses will have more coverage im sure, but the price is prohibitive.
     
  15. holmburgers

    holmburgers Member

    Messages:
    4,423
    Joined:
    Aug 13, 2009
    Location:
    Rochester NY
    Shooter:
    Multi Format
    Very cool examples. The lenses definitely get wooly on the edges, but still interesting. I hadn't considered a recessed lens board to overcome the focal-flange-distnace.... DUH! :wink: