Features: Based on MarkII-S, the transmission system of DP500III has made great improvement in accuracy and smoothness. While ensuring high reliability and stability, it is 16% lighter, more portable to carry. The gear ring belt suitable for lens of 48 ~ 134mm outer diameter. The A/B stop makes it fast to switch focus between two items. f15mm clamps compatible for universal rod systems. The speed crank handle(aluminum) will offer a 90right angle to control the follow focus. 0.8M gears(43T/65T) to fit different lens, can be mounted on both right and left sizes. Newly added rubber surface, high tolerance to hot/cold temperature, better texture in cold condition.