Here's a good link to show why camera experts may question it validity, this is from someone who believes they've been, but believes Kubrick filmed the Apollo 11 footage, excerpt;
There is another telltale fingerprint that comes with front screen projection. This has to do with a photographic situation called depth of field. Depth of field has to do with the plane of focus that the lens of the camera is tuned to. The bigger the format of the film the less depth of field there is. For instance, 16mm film has a large depth of field. 35mm has a small depth of field and 70 mm (which Stanley was using in 2001) has an incredibly small depth of field. What this means is that it is virtually impossible for two objects that are far apart in the lens of a 70mm camera to be in the same plane of focus. One of the two objects will always be out-of-focus. Filmmakers like to use depth of field because it creates soft out-of-focus backgrounds that are visually very pleasant to the human eye.
While watching the ape scenes at the beginning of 2001, one can see that everything is in focus. Whether it is the apes or the far away desert background - they are all in focus. This is because the front project screen on which the background desert scenes is projected is actually not far away from the ape actor. In reality the desert scene and the Scotchlite screen are right behind the actors. So whatever is projected onto that screen will be in the same plane of focus as the actor ape. This depth of field is impossible in real life using a large format film like 70 mm. Keeping everything in focus is only possible if everything is actually confined to a small place. It may look like the ape-men are somewhere in a huge desert landscape but in reality they are all on a small set in a studio.
The very same tell-take evidence in on every lunar surface Apollo photograph that has a background.
The Apollo astronauts were using Hassleblad cameras with 2 - 1/4' by 3- ??' with Ektachrome film. This is large format film with all of the same depth of field problems that would come with shooting 70mm film. The plane of focus on these cameras is incredibly small. This should have been a huge problem for the astronaut-photographers, who would have to be constantly adjusting the focus. We could expect to see a lot of out of focus shots taken by the astronauts. When you consider that they did not even have the ability to see thought the viewfinder of their cameras, this would only increase the chances that most of what they would be shooting would be out of focus.
I have gone through the entire photographic record of Apollo program, both at Goddard in Greenbelt Maryland in the main photographic repository at NASA's Houston headquarters.
When the photographic record is examined, the exact opposite of what one would expect to find is discovered. Instead of many out of focus shots, we find that nearly every shot is in pristine focus. And these amateur photographer- astronauts have an uncanny sense of composition, especially when one remembers that they are not even able to look through their camera's viewfinders.
Honestly, even a professional photographer looking through the viewer would be hard pressed to come up with the pristine imagery of the Apollo astronaut amateur photographers.
Unfortunately though for everyone involved, the fact that everything is in focus in the Apollo record is the old telltale fingerprint of front screen projection.
http://www.sacredmysteries.com/public/263.cfm
The article is a bit muddled though, it refers to looking up at Apollo pictures when they are below etc. Interesting though.