Why not? With a lens of realistic diameter/speed and of the appropriate coverage (embedded in that huge barrel).
And the appropriate lighting.
Fair question that only Mr. Manarchy can answer fairly. Since he's not here, I'll answer unfairly.
If I understand Mr. Manarchy's claims for the device correctly, the camera is 35 feet long and 12 feet tall. I interpret this to mean that the lens board to film plane distance is 35 feet. I could be mistaken here, a clarification from the source would be helpful. It is very possible that the trailer is a 35 footer and the camera is no more than 20 feet long. Look at this video
http://www.nbcchicago.com/news/local/224249321.html. If the camera's claimed dimensions are right the people standing around it are very tall indeed.
If you look at
Dead Link Removed, you'll see that the camera
may focus by moving the subject. The standards seem to be fixed on the trailer, so extension is fixed. If this is right then the plane of best focus is fixed and the plate the subject poses on doesn't have to move very much.
If the lens used really is a 1070 mm (42 inches) Apo Ronar, 35' extension means that magnification is approximately 9:1. The shots that Mr. Manarchy has displayed are head and shoulders. The distance from the top of my head to the top of my sternumis 15". 9*15 is 135 inches. At that magnification my head and shoulders won't fit on a neg 72 inches high. 20' extension means ~ 5:1. I still won't fit the neg.
At 9:1, effective aperture is 10 stops down from the aperture set. Never mind about diffraction problems, this means that getting a good exposure of a sitter requires considerable light or clamping the sitter solidly in place. There are no flashes or apparatus to hold the sitter in place visible and the sun just isn't bright enough to get a sharp image without a well-stabilized subject. 5:1 still demands more light/steadiness than is available.
I wouldn't be surprised if the real working camera is a version of Mr. Manarchy's room cam hidden inside the monstrosity.