Fotga DP500III A/B Hard Stop Follow Focus Puller,15mm Quick Release Rod Clamp for Film Movie Video Making Canon Nikon Sony Blackmagic DSLR Cinema Video Mirrorless Camera Cine Lens No Backlash
The particular part of this follow focus is it can use different size gears.It can work with 3 different size gear to meet your different need with various lens: 38T (38 teeth) 0.8mm pitch,diameter is approx.28mm (not included) 43T (43 teeth) 0.8mm pitch,diameter is approx.31mm (included) 65T (65 teeth) 0.8mm pitch,diameter is approx.49mm(not included).
