Camera Lens Focal Length Test
prusaprinters
<p>I just started working on my DIY camera lens build and wanted to verify that my focal length calculations were correct, so I made up a quick jig to test!</p><p>There are 2 teloscoping tubes, one tube has a feature that fits on the camera mount, the other fits the lens. After estimating your focal length, change the necessary dimensions on the Fusion 360 file, and then print!</p><p>Now, install your lens, and while holding the assembly against your camera body, move the tubes until you can focus on an object. Check a few objects at various distances. Then use a marker to mark the location of the tubes and BAM! You have a focal length!</p><p>Note: STL file is designed for a Canon EF-M mount size and a 40mm DIY x 15mm thick lens with an estimated focal length of around 200mm.</p>
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