IPVMU Certified | 01/24/13 05:29pm
Benefits? Fabricating metal is more expensive than molding plastic. Plastic is often less expensive than metal as a raw material. For the end user, polycarbonate will not corrode, can be molded into a variety of colors (no paint needed) and is lighter.
I don't know specific polycarbonate material blends used in camera housings, but I do know that raw materials are typically furnished to manufacturers with CoA papers - 'certificate of analysis' - that confirms material of a certain lot maintains a certain composition. For outdoor housings, I'm sure that UV stability is fairly important.
I am curious to what degree recycled or 'reground' material is used to make housings. 'Virgin' material is more costly, and I wonder if when I read a cameras 'Green Compliance' branding if I'm really reading 'Made of reused plastic'.