To me though interesting is not using an effect attachment of any kind, but using a crank for rotation of such and not just twisting it by hand.
The crank and the respective gearing add weight to a handheld combo.
The attachment is not (or not only) screwed to the filter thread, but by means of a lug and a levered screw attached to a, likely telescopic, rod which ends at a camera-plate.
Seen the weight of the whole shebang the weight of the crank mechanism though would be less prominent.