STM stepping motor that affords fast, near-silent. An integrated micro-USB port for making future firmware updates to the lens. The lens adopts STM stepper motor, which provide quiet autofocus experience and tend not to affect the photo or video shooting.
eBay
STM STEPPER MOTOR. Quiet STM focus motor, fast and accurate focusing. Using STM silent motor to achieve precise and fast autofocus. Even novices can get started quickly. 56mm focal length, F1.7 aperture.
eBay
1x protective decal skin. Just s ell the p rotective decal skin. (Otherwise, t he color of the g ap between the decal skin will be in contrast ). Don't include the cam era / lens / flash / drone body et c.
eBay