Well if I was to have a REALLY nice camera made from wood I think Cherry with a nice clear polyurethane coating would be my choice. For a basic camera Ash would probably be fine and if left in the sun for a while it darkens up really nicely. Walnut and Mahogany are really nice too, but I think the reds in Cherry would be my preference.
If you feeling like doing a freebee and have some time to design it, throw together a billet aluminum 6x7 that will take an RB or RZ back and I might give that a go on my milling machine. It's all hand crank so nothing too complex.