GoPro Sleeve + Lanyard - Black Serialised there are four categories for

there are four categories for prime lenses and 16 categories (four options for focal length

A Hyper Sonic AF Motor

and it delivers improved center-to-edge resolution and brightness free from chromatic aberration

Covering a useful range of focal lengths

One fluorite element and eight extra-low dispersion glass elements are incorporated into the optical design to greatly reduce colour fringing and chromatic aberrations in order to achieve notable clarity and colour accuracy

GoPro Sleeve + Lanyard - Black Serialised there are four categories forThe GoPro Sleeve + Lanyard set for HERO Black features a black silicone protective sleeve cover that protects your camera from scratches while leaving access to the ports, buttons, and front and rear displays of the camera. Using the lanyard, you can wear the camera around your neck, or you can remove the lanyard and mount the camera on various supports the way you normally would in most cases.