Fairchild F-56 - a special photographic camera with a focal length of 21.6 cm used in reconnaissance aircraft.
Usage:
Grumman F4F-3P Wildcat
Grumman F4F-3AP Wildcat
Grumman F4F-4P Wildcat
Grumman F4F-7 Wildcat
Beechcraft RC-45J (SNB-5P Navigator)
Source: Richard S. Dann - F4F Wildcat in action, Aircraft Number 191, Squadron Signal 2004, ISBN 0-89747- 469-4
http://www.twinbeech.com/rc45j_29585.htm
Usage:
Grumman F4F-3P Wildcat
Grumman F4F-3AP Wildcat
Grumman F4F-4P Wildcat
Grumman F4F-7 Wildcat
Beechcraft RC-45J (SNB-5P Navigator)
Source: Richard S. Dann - F4F Wildcat in action, Aircraft Number 191, Squadron Signal 2004, ISBN 0-89747- 469-4
http://www.twinbeech.com/rc45j_29585.htm