If you're shooting T-lapse there is a machine that rotates a lens cap like protector over the front of the lens between shutter firings.
Works something like this.
Waits selected interval
Ends all worries about external conditions f**king up your shot and camera but I've forgotten the name of the bloody thing but I think that Panavison hire it out.
(I made one once, fairly simple too when using electro-mechanical type cams but all digital cams like RED might require more skills)