From memory I think the FAA made it illegal to use any electronic device which was not specific and needed for the flight and as such a camera or mobile phone would be illegal.
MizzFlyer
I use Rocket route which is a brilliant programme for the money and have tha airways charts. I also have that backed up on my I phone 6 and its great to watch the jet I fly chugging along the upper airways as well as all the other programmes needed for flight backed up on the I phone as well as the I pad
Who knows both I pads could go down then I would be left with my phone for approach charts etc ??
as such it would be argued as a vital piece of equipment needed for the flight
Just because I accidentally hit the movie button or picture button
not my fault ))
Pace