1.To protect lens head and some other object with high ABS plastic 2.could provide you all size from 39-82mm

Characteristic: lens hood is always using in shadowgraph, it could avoid glare when take photo. But if the light source is very close, it also could lend to glare. While, please cover a side of lens hood with hand to the light source. It could see clear from the viewfinder to know the glare existed.

lotus lens hood for digital camera and dslr