Upload & Sell: Off
On a Mac that would be Option-G.
I can't help with entering it on the camera (but I noticed the Nikons are the same: maybe it's something to do with extended ASCII codes? I'm talking out of my hat here).
However, you don't strictly need the copyright symbol in a copyright notice. In fact, you don't need the notice, since copyright exists in the work automatically. But to make it clear to potential thieves that copyright exists, use the word Copyright in addition to your (c). Something like this would work: Copyright (c) 2012 Eye Laser.
Contrary to popular belief, the law isn't usually fussy about the wording of things, as long as it's precise and impossible to misconstrue.