Time to proceed. The aluminum is bent to provide a slight downward camera angle. This lets me fly level while taking pictures and keeps the wing from taking up half the frame. A servo arm was modified to trip and hold the shutter down without putting a load on the servo. The camera is held on the mount with rubber bands.
Foam rubber helps isolate the camera from engine vibration.
The servo is simply rubber banded to the mount so that the servo arm is in the right position to press the shutter release. The only real problem with this arrangement is that the whole shebang must be removed from the plane and disassembled to change film. Future enhancements should take care of this problem. A few hours of fabrication and fitting resulted in an aerial photo system that looked like it should function. I loaded the camera with film and assembled the mount, camera and servo.