Picatinny 20mm camera hotshoe adapter
thingiverse
This is a versatile Picatinny rail adapter designed specifically to fit onto a hot shoe, measuring 20mm in diameter. I personally tested this adapter on my Pentax KP and confirmed its functionality. However, I'm uncertain about its performance with Canon cameras, as their models often come equipped with a built-in hot shoe sensor that may interfere with the adapter's operation.
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