Lens or Port Diameter at the base or back of the widest part
- Port Cover shown on external Olympus 67mm macro lens. Actual diameter = 3″, height = 0.75″
- Port Cover shown on Nexus 100 mm Flat port. Actual diameter = 4″, height = 2.75″. Elastic applied inside to hold cover onto flush-mounted port.
- Port Cover shown on Fathom 90 wide < lens. Also available for other styles