The Lee Filter Lens Cap is made of white polypropylene and, when attached, can be used to white balance a digital SLR, or as a makeshift incident lightmeter on any camera.
They can also be written on to identify lenses in the camera bag.
The lens cap attaches to the Lee Filters Adaptor Ring and allows you to leave them on at all times while keeping the front element clean and safe.
Pack of 3
(adaptor ring not included)