I managed to balance GH5 and Sigma 18-35 with ND filter on old Moza Air gimbal and it works smooth and steady, just saved a lot of money Weebill S would cost
Cine sigma 18-35 canon ef manual parfocal for bmpcc6k ursa red epic komodo c300 | eBay
Sigma 18-35mm F1.8 DC HSM Art Lens Review: A Default Option For Cropping!
Amazon.com : 72mm Variable Neutral Density NDX Filter for Sigma 18-35mm F1.8 DC HSM Macro : Electronics
Amazon.com : Sigma 18-35mm F1.8 DC HSM Macro Compatible Digital Multi-Coated Circular Polarizer Filter (CPL - 72mm) : Electronics
Canon R7 - Sigma 18-35 & Meike Variable ND Filter Adapter // Best Video Lens - YouTube
BMPCC6k I tried to make my sigma 18-35 more cinematic with physical filters - YouTube