The previous model has been improved and reduced from 7.9 oz (220 g) to 6.3 oz (160 g). New interchangeable gear/marking discs and quick release hard stop system added This single rod base system is mounted through a 15mm rod to accommodate a variety of lens gear. One 15mm rod fits most systems Interchangeable gear can be used with lenses with different size focus ring gears, and kit includes 0.8mm pitch gears that are compatible with most cinema lenses and the included photo lens follow focus gear rings. Gears of different sizes will be released soon. This unit supports 360 degree rotation and has adjustable AB markings. Quick lock and switch The new locking system allows you to limit or remove hard stops while leaving the AB stop position marked. The focus wheel uses a fluid dampening system that mimics the feel of the lens itself to support precise focusing. Magnetic marking discs can be used to mark different focal lengths and can be easily replaced if needed. Compatible with standard size focus whip and crank