Although the lens on the Raspberry Pi camera board is nominally fixed-focus, we’ve found that with a bit of hackery, you can gently unscrew it from its mount and change the focal depth.
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Macro filming and photography with the camera board
Dave Hunt is on a bit of a roll at the moment. Not content with having engineered the water droplet photography setup behind the prettiest post we’ve featured here, he’s also been working with the Pi and an home-made macro rail for sharper macro photographs without all that woolly depth of field.
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Focus-stacking with Raspberry Pi for macro photography