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Thread: New Cameo 55 Camera

  1. #1
    500+ Posts MarkB's Avatar
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    New Cameo 55 Camera

    It has been years since I designed/built a new camera. Here is the Cameo 55 that I just finished. My goal was to see how small a camera I could make for 120 roll film. I achieved a pretty tight package, but the field of view, at about 110 degrees is too wide, more on this below. The body is made of aluminum and cherry, dimensions 2" x 3" x 4". That's the body, the winding knob sticks up about 5/8" making overall height 4.625". This is less than half of the volume of my earlier Cameo 637 (more at: http://www.f295.org/main/showthread....ighlight=cameo ). The square negative of the 55 (approx. 55mm x 55mm) is about 50% larger than the rectangular negative of the 637. This yields 12 negatives per 120 roll. With a .22mm (approx) pinhole in the camera it is around f90. Here are some images. The field of view (110 deg) is wider than I'd like because it introduces more than 2 stops of light fall-off between the center of the neg and the corners. This owes to the short distance between the pinhole and the film plane, and the eclipsing of the pinhole at the edges of the image. I will post some images over in the BandW forum where you can see the extensive vignetting. They are here: http://www.f295.org/main/showthread....807#post129807
    Front, back and closeup of the shutter:
    a_Cam55 Front.jpgb_Cam55 Back.jpgc_Cam55 Shutter Detail.jpg
    Last edited by MarkB; 08-26-2015 at 07:48 PM.

  2. #2
    500+ Posts MarkB's Avatar
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    ...more pictures of the camera. Top showing winding knob, spirit level and screw attachment to hold the top in place. Bottom showing tripod mount. Inside showing the film path. And finally the inside bottom of the top plate:
    d_Cam55 Top Detail.jpge_Cam55 Bottom Detail.jpgf_Cam55 Inside.jpgg_Cam55 Lid Detail.jpg

  3. #3
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    Cool camera, good job!
    The world is not black and white. It often looks good in grayscale, though.
    http://www.flickr.com/photos/msgallery/sets/

  4. #4
    500+ Posts jon.oman's Avatar
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    Wow! This looks like a great camera!

  5. #5
    Cool shutter. Very nice design.
    see my other work at:- http://www.flickr.com/photos/paintings_by_johnnelson/

  6. #6
    Administrator Tom Persinger's Avatar
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    as a proud owner of one of the first versions, I love this one! Looks great!

  7. #7
    500+ Posts MarkB's Avatar
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    Thanks for the comments. Here's a size comparison with the 637 model.
    Compare 1.jpgCompare 2.jpg

  8. #8

  9. #9
    Great job! Your cameras are really cool. I remember that one of your pinholes- that's from avatar was inspiration for me to build my own first camera

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