Durable Paper Pinhole Exposure Calculator

thingiverse

If you lack a light meter, utilize Richard Koolish's smart mechanical calculator to choose the exposure time for tiny aperture cameras requiring lengthy exposure times. Available online are various versions of this tool, including Ilford's version. Assemble the device by following these steps: print the disks and calculator page, smooth the top surfaces, glue paper disks onto 3D printed ones, clean excess paper from center holes, and secure with a bolt, locknut, and washers. Attach a lanyard for easy carrying. Remember that this calculator doesn't consider reciprocity failure, which is unique to your film choice and requires adjusting exposure times. For more information on reciprocity failure, search "reciprocity failure for _myfilm". Shoot pinhole photos with your newly created calculator!