Conspiracy theorists claim that the shadows are in fact caused by studio lighting, either by a light source which is relatively close and/or by multiple light sources.
The truth is that converging shadows are a well-know optical phenomena in photography. There is nothing mysterious about it, in fact you can easily replicate this effect yourself as per the example below.
Apollo photograph which appears to show that the shadows are not parallel, as highlighted by the added red lines.
However this photo, taken by a Fujifilm camera using only the Sun as a light source, clearly shows how any camera will produce the same effect.
This effect is caused by several factors including perspective and the way the surface is inclined relative to the camera and light source.
If this is not proof enough, there are two more points to note:
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