Ryanair T& C's
11.2 ELECTRONIC DEVICES
For safety reasons, we may forbid or limit operation aboard the aircraft of electronic equipment, including, but not limited to cellular telephones, laptop computers, portable recorders, portable radios, CD players, electronic games or transmitting devices, including radio controlled toys and walkie-talkies. Operation of hearing aids and heart pacemakers is permitted.
A camera,to my mind, is portable & is a recording device. Note also that the list is not exhaustive!