Ahh, classic portrait focal length Acadia. That's good advice. :)

If you take a look around on the 'net you'll find heaps of info for 35mm photography showing what focal lengths are best for different scenes. This will most definately apply to Poser as well. Just be careful though because 'standard' focal lengths in 35mm are not the same as those in digital photography. For example a 50mm lens in 35mm photography is considered to be 1:1, ie what the human eye sees, but in digital photography unless the CCD sensor is 24mmx36mm (35mm film size) the image from a 50mm may look closer to what you would get from around an 80mm in 35mm photography.

Sorry about the technical description, I just thought it relevant. :)