The manual sucks, use it for something other than the game
There are some excellent guides in the stickies. When you get a chance, check them out. You use the camera with the Observation Periscope., when using and and when you have a target, the camera on the Hud lights up, that is when you take a pic, by clicking on the camera icon.
A post from the camera\photo sticky:
http://www.subsim.com/radioroom/show...93&postcount=9
RDP