Extend the reach of your Canon EOS C Series handgrip with this SHAPE Grip Relocator Extension Cable. The coiled design won't sag and tangle up your rig, and stretches for versatile handgrip placement. The 3.5mm connector is compatible with EOS C Series cameras that use the standard handgrip, including the Canon EOS C100, C100 Mark II, C300, C300 Mark II, and C500.
It said it'd work with canons cinema line so I figured it'd work with my c300 mark III since it said it works with the mark II. Unfortunately it didn't work. It worked with my C100 Mark II though just fine.
This worked fantastic! We needed a quick, inexpensive fix to use our C100 on our Ronin and this did the job. Just plugged into the grip/camera, then gaffed to the side arm of the Ronin and we were good to go. Way better option than some of the more expensive rigs advertised.