Pinhole Camera Exposure Calculator
thingiverse
Camera Exposure Calculator from HARMAN technology; diagram and instructions found here: https://www.harmantechnology.com/amfile/file/download/file/1924/product/591/ Paper version and instructions on how to use it are in the link. I have no affiliation with this company. This was made for personal use only. A friend wanted to make this item for a photography class and wanted something more substantial than paper. I vectored the images in Inkscape, modeled them in Fusion 360, and put some final touches in Windows 3d Builder. I also modeled some washers to go between the layers and a retaining pin to connect them, but I haven't tested them yet. More to come on that.
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