PINH5AD - a 4x5 Pinhole Camera by schlem

Last crawled date: 3 years, 1 month ago

The P5 is designed around a 4x5 film holder, widely available used or surplus. Film holders have a "dark slide" that protects unexposed film/paper from light, so the rubber band to close the shutter is not necessary (or desirable for long exposures). See exposure times note in instructions section.
Using the proven Pinhead shutter design, and lacking any film transport mechanism, the shutter blade is the only moving part.
NEW! 150mm extension available for "normal lens" exposures (not wide-angle, not telephoto) see: http://en.wikipedia.org/wiki/Normal_lens).
Stats ---------------------
90mm focal length
designed for a 0.40mm pinhole
f-stop of f/225
70 degree horiz. field of view.
150mm focal length
designed for a 0.50mm pinhole
f-stop of f/300
46 degree horiz. field of view.
If you print a PINH5AD, message me, and I will send you some Pinhead stickers.
PICTURES: http://www.flickr.com/photos/theschlem/sets/72157635640450384/
As always, more build pix available at:http://www.flickr.com/photos/theschlem/sets/72157635388826290/
I have created a 3D Printed Cameras group on Flickrhttp://www.flickr.com/groups/2263247@N20/
The mission is to share and promote open source cameras and related parts, created with CAD applications and 3D printing. Please join and post content!
-------- UPDATES since CAD illustrations --------
viewfinders added for both extension lengths
manifold issues in P5 Body fixed - please re-download corrected file if you have strange slicing behavior.
opening on shutter plate resized to 4:5 rectangle to minimize very slight vignetting of 90mm field of view
body reinforced at tripod mounting points to minimize possible lateral flexion / vibration
corners of extension mount enlarged for thicker walls
bottom added to small cavities in body for better bonding to film holder bracket
inside perimeter of pinhole clamp enlarged for better fit
3D printed ground glass holder http://www.thingiverse.com/thing:267909
Film Holder Clip added to hold holder/ground glass firmly against back of camera. Designed for rubber bands (elastics) or small bungies, and to not obscure the projected image on the ground glass.
Available at Shapeways in laser-sintered nylon:https://www.shapeways.com/model/1327840/pinh5ad-the-3d-printed-4x5-pinhole-camera.html?li=shop-results&materialId=25
ATTENTION
This work is licensed under the Creative Commons - Attribution - Non-Commercial license. This license applies only to the files and documents available for download from the Thing Files section of this Thing.All other related content (photographs, videos, and verbiage such as contained in "Description" or "Instructions" ) are excluded from this license. with all rights reserved, unless specifically available for download This notice constitutes a clarification, not a change, to licensing for this design.