Dear Paul,
There is a color photo of W.Nr. 463 141 "Schwarze 17" published in Merrick and Green 2007 which verifies the black color of the tactical marking, and a bountiful of b/w photos published among them a few here as a sample:
http://www.flickr.com/photos/2809206...-8T1rQx-8T1rT4
http://www.flickr.com/photos/2809206...-8T1rQx-8T1rT4
Through the known to me photos of this machine, none does clearly illustrate the presence of a R3 belly-rack which would be more then expected though. The only hint of its presence is possibly the forward toggles of the belly-rack faintly to be seen on the photo published in Bergström and Pegg 2005, Jagdwaffe, volume 5, section 2, The war in the East 1944 - 1945, Classic Colours, p. 172.
As for the cameras, this would be expected for a recce machine, but I never saw photo showing how they were integrated in the fuselage and if their lense fairing was the same used on G-5's, G-6's or G-8's.
Cheers
Marc