terraPin, a 120 Film Pinhole Photography System
by schlem, published
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The terraPin Pinhole Camera is unlike any other pinhole camera, 3D printed or otherwise. Developed after years of experience designing and constructing pinhole cameras, the terraPin is intended to be very easy to assemble, modify, and hack. Derived from the P6*6, the terraPin also uses 120 film, with a 6 X 6 cm frame, like the Holga, Hasselblad, and other classic medium format cameras. Dozens of P6*6 pinhole photographers around the world provided input and feedback to help shape the terraPin.
The "Slider" joint between the body and extension allows for effortless changes in focal length, angle of view, and magnification. One camera body and film transport mechanism can be used with multiple extensions, each with their own pinhole and shutter blade.
Assembly is a snap. A dovetail joint sandwiches the pinhole and shutter without fiddly fasteners. A single bolt holds the joint securely and provides a pre-load on the shutter fulcrum. Reduced number of glued joints in the terraPin. Velvet or felt is no longer required for light-tight construction. NOTE There is the potential for a light leak at the bottom of the extension-body joint, which manifests at the top of a landscape photograph (remember the image is inverted on the film). For more information see thing:703591: terraPin Stawp Gap
See terraPin High-Strength Winder (1/4" shaft) for additional winder/knob options!
This VIDEO, by Thingiversian nebotron, features a time-lapse assembly of the terraPin 6x6!
This VIDEO shows the basic assembly of the terraPin, but he printed it in a white plastic that is going to be problematic with film fogging.
NOW there are four different extension options, each of which can be found as a complete collection of all necessary parts, in a ZIP file.
- 50mm, designed for 0.30mm pinhole, f/167
- 35mm, designed for 0.26mm pinhole f/135
- 25.4mm, designed for 0.22mm pinhole f/132
- 18mm, designed for 0.18mm pinhole f/127
Additionally, individual parts are included for your convenience. Don't hesitate to ask for direction if the abundant parts catalog is confusing.
- Tripod mount
- Frame indexing window with cover slide
- Bolts secure the cap to the body during use for greater security
- Greatly reduced fastener count
- terraTool mini allen driver for opening/closing camera
- Multiple knob choices to customize your terraPin (can be retro'd to any Schlaboratory 3D printed pinhole camera)
- Dual winding knobs for precision indexing / rewinding (film swaps)
- Lefty-friendly with mirrored extensions and left or right film transport
- Film clips prevent unspooling of film during unloading ("fat roll")
- Uses same proven exposure duration calculations as P6*6 (see Thing Files)
- STILL fits on the smallest of print beds
- Designed for PLA 3D printing
To Do List:
- Update User's Guide
- Finish OpenSCAD script to generate trim plates to fit 52mm threaded rings for lens cap and filters
- Expand exposure calculations for additional films (In progress)
- Assembly and instructional video
- Detailed assembly instructions
Butta Shutter remote actuated shutter
- Added exposure data with reciprocity failure for Kodak Portra 160/400, 5/28/15 - see:
The terraPin was modeled using Tinkercad and OpenSCAD. Credit and thanks to Thingiverse citizen Aubenc for the Knurled Surface Library v2, which greatly improves the appearance of my cameras.
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.
The shutter is tensioned by and pivots about a single 3mm bolt. A socket head bolt will fit in the trim plate nicely. 8-12mm length will work; I like to gently tap the hole for a smoother fit and finer adjustment. A gentle touch here will reward you with perfect threads.
The cap is held in place by two 15mm-long 3mm bolts, with 3mm captive nuts in the body. If you can find hex-head bolts, there are "knobblers" (press-fit caps) that allow for easy assembly / disassembly without tools.
The body is designed to accept a standard 1/4-20 flanged nut for the tripod mount.
The exploded diagrams in the Thing photos detail assembly.
A 14 mm diameter disc of translucent red plastic allows for viewing frame numbers on the back of the camera. (plastic binder / portfolios are a good source for suitable material)
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terraPin, a 120 Film Pinhole Photography System by schlem is licensed under the Creative Commons - Attribution - Non-Commercial license.
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