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I don't see any safety features built in to protect your lens? at such low gearing ratios, that motor has a LOT of torque, and can easily damage your lens. It's one thing to save $100 by making something DIY, but you can easily destroy a $4000 lens in one minutethoughts?
Dial and Draw
AWESOME SAUCE!(in Thailand, 555 is text shortcut for "Ha-Ha-Ha") (because "5" in Thai is pronounced "Ha")
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