Regarding the "vivid detail in shadows" and multiple light sources bit, there are reasonable photographic explanations.
First of all, there is all the light reflected off the white spacesuits: second, since the moon itself is not precisely matte black, there would be reflection off geographical features (boulders, hills).
Another interesting factor was that the LEM itself and other moon mission equipment had parts covered with very reflective foil, and was mostly of a clear color. That too would have produced reflections, some of them probably specular.
Thirdly, those people went on the moon with some very good Hasselblad cameras, excellent 70 mm black and white and color film, and you can bet that the pictures were printed with the utmost care. Negative film has a very wide exposure range (10 stops, typical) that a good printer will exploit fully.
And of course, as Roninspoon pointed out, there is that big blue planet in the sky.
As an aside, my main beef with this particular conspiracy theory is that the Russians would have known, and I can't see any reason for them to keep silent at the moment.