Alternately, try the ES approach, where I use my old trusty totally mechanical Nikon FM to get nice photies through the window at any point of a flight. No mindless autofocus to be confused by glass either. Big solid clunk, but no horrible nasty electrical stuff anywhere.
Of course, was naughty boy on last two trips by taking photos from air over Russia. Very illegal occupation apparently that will get my wrist slapped by local security boys. Afterall, photo of wing over sunset clouds might just contain a state secret...
