In the top photo at this website, http://www.clavius.org/a11rear.html Armstrong's shadow is off to the left. There is a website that claims that the photographer's feet should be directly under the center of the photograph, not off to the side. This issue is not addressed at the Clavius page. Is there a good counter to that argument?
This always seemed like a particularly weird claim. Why would they fake an astronaut taking a picture of his shadow, instead of just...having him take a picture of his shadow?
Anyway...think of what lines do in a perspective view with minimal lens distortion and a level camera, not tilted: Straight lines transform to straight lines. Parallel lines converge at a vanishing point at infinity, and radial lines meeting at a point under the viewpoint each project onto a vertical strip of the image. Armstrong's shadow follows just such a line. This isn't the ideal case: the camera is tilted and the ground is irregular, so the astronaut's shadow isn't precisely vertical in the image, but it's easily consistent with the officially claimed source.
Here's a stock photo showing similar geometry:
http://www.shutterstock.com/pic-45404746/stock-photo-bright-path-with-converging-perspective-lines-on-a-winter-morning-with-a-person-walking-in-the.htmlThe photographer is standing on that path, pretty much on the shadow boundary of the grass to the left. This shadow line projects to a vertical line off to one side in the photo, very much like Armstrong's shadow in AS11-40-5961.
Also, it doesn't apply to this particular case, but hoax proponents often use heavily cropped images, which can produce some odd perspective effects.