terraPinstax Wide Pinhole Camera Body

thingiverse

This project came to life when a friend requested that I design a pinhole camera body around an [instant film back, made by Lomography for the Belair Lomo camera](https://shop.lomography.com/en/belair-instant-back?). She wanted a wide angle of view, but otherwise gave me free rein. I settled on a 35mm "focal length", and after some math worked out that the aperture should be 0.26 mm in diameter. This gives a F Stop of f/136 in the middle, but shooting this at f/165 is a nice compromise between an overexposed center or dark, dark corners. The Lomography instant film back ([User's Guide](https://www.lomography.com/magazine/264756-belair-x-6-12-instant-back-ready-to-shoot-guide)) uses [Fujifilm Instax Wide film](https://www.amazon.com/Fujifilm-Instant-20-Exposures-Packaging/dp/B00ZFQQJ18/ref=sr_1_2) packs, a popular and vibrant instant film stock. The film is available in a variety of formats, and a variety of cameras are available from Fujifilm and other manufacturers. Unlike Fujifilm/Fujichrome professional film stocks, technical data is not provided for [reciprocity failure](https://en.wikipedia.org/wiki/Reciprocity_(photography)#Reciprocity_failure) (RF) behavior. I am testing the film with the goal of a reliable RF curve, but I am still in the early stages. Experimentation continues. Previously, I designed [a pinhole camera body to work with the Lomography Instax Mini film back for the Diana F+ camera](https://www.thingiverse.com/thing:433249). I wrote a bit about my struggles getting the film to work in a pinhole camera on [Hackaday}(https://hackaday.io/project/211-pinstax-3d-printed-instant-pinhole-camera). **Film specifications** (wikipedia) Film speed ISO 800/30° Colour temperature Daylight type (5500K) Resolving power 10 lines/mm Photos per pack 10 Film size (W×H) 108 mm × 86 mm (4.3 in × 3.4 in) Image size (W×H) 99 mm × 62 mm (3.9 in × 2.4 in) Aspect ratio 1.618:1 Film pack size (W×H×D) 115 mm × 92 mm × 20 mm (4.5 in × 3.6 in × 0.8 in) The film is fast (ISO 800), but my testing reveals that exposures compensated for RF are much longer than many slower film stocks. Shooting the film outside the designed exposure parameters (i.e. slow pinhole shots) also causes a blue color shift. Embrace this, play with this. Colored filters may be able to correct for this, but don't expect accurate color rendering. ___ **ATTENTION** This work is licensed under the [Creative Commons - Attribution - Non-Commercial license](http://creativecommons.org/licenses/by-nc/3.0/). 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.