There was another photo-recon version of the Demon, the F3H-1P, if you're aware. The F3H-2P itself was similar to the F3H-2 but had its radar and armament replaced by camera installations. Likewise, the F3H-1P was similar to the F3H-1N but with spy camera substituted for the armament and radar.
Angelucci, Enzo and Peter M. Bowers. The American Fighter. Sparkford, Somerset, UK: Haynes Publishing Group, 1987. ISBN 0-85429-635-2.
Baugher, Joe (1 January 2007). "McDonnell F3H-2N, F3H-2M, F3H-2 (F-3C, MF-3B, F-3B) Demon." http://www.joebaugher.com/navy_fighters/f3_3.html