N50 Short Port with M67 Thread ~for Wet Wide Angle Lenses (Widest Focal Length Only) trigger This zoom gear is for

This zoom gear is for the Sony E-Mount 10-18mm F4 lens

Protective hard cap for 250mm Optical-Glass Wide-Angle Dome Port

42 x 40 x 36mm Weight: Approx

This focus gear is specific for the AF-S NIKKOR 16-35mm f/4G ED VR lens

N50 Short Port with M67 Thread ~for Wet Wide Angle Lenses (Widest Focal Length Only) trigger This zoom gear is forThis short port is part of the N50 port system and features an optical glass front element and anodized aluminum construction. Different size ports are available to support a wide variety of lenses and housing types. Port extensions or adapters may be necessary for some ports and housings. The N50 Short Port offers precise placement of wide lenses very close to the port's front element at its widest angle zoom position. Zoom through is not available