Amazon.com : SmallRig Mini Follow Focus with A/B Stops & 15mm Rod Clamp and Snap-on Gear Ring Belt for DLSRs and Mirrorless Cameras, Fits Different Diameter Lenses Up to 114mm - 3010 :
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Amazon.com : FILMCITY Professional Follow Focus for 15mm Rod Support, DSLR Camera & Shoulder Rig. With A/B Hard Stops, Flexible Gear Belt & Speed Crank. Precise Focus Adjustments, Adapts Small to Wider
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Amazon.com : SmallRig MagicFIZ Wireless Follow Focus Basic Kit with Handwheel Controller and Receiver Motor, 100m / 328ft Remote Focus Control for DSLR and Cine Lenses - 3781 : Electronics
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