After some period spent experimenting I use a wide angle lens and a ear cup mounted remote mic.
Plugging the cam into the intercom gave me distortion from the transponder.
The standard lens is pretty limited for internal shots in a four place light aircraft.
My Panasonic camcorder is tape based (last of the steam engines) and has 3 CCDs with a stability software system and works how I want.
The fisheye actually shows external views as good as the standard lens. If you zoom the standard lens too much it gets crappy and shaky anyway.
The best way to shoot good video is to shoot LOTS of video...