"In another thread some time ago, I think someone said the human eye has a "focal value" of about 55 in poser terms." I think I'm responsible for making that statement in a thread some time ago. Just keep in mind that focal values depend on the size of the film used. 55 mm (or somewhere in that neighborhood) is a value for the human eye compared to focal lengths used by a 35 mm camera. If you look at a digital camera, the values are different since the film plane is smaller. A medium format camera used by studio photographers (Hasselblad and others) has a 60x60 film format, that means that the "human eye equivalent" is a focal length of 80 mm. But, as stated above, it appears that the Poser figures are based on a standard 35 mm camera.