The camera is a Oly EPL3 and a Oly PT-EP05L which has front LED lighting powered by 2 AAA batteries. This lighting is pretty useless and I dont use it so the space can be used by my project.
Is this LED needed for auto focus while submerged?
IRremote library has been ported to/hacked for the ATtiny85 see TKJ Electronics » ATtinyRemote and Porting the Arduino IRremote library to the ATtiny4313 | ubiyubix so all the goals might be possible using IR (assuming it works underwater okay).