The human eye focal lentgh is approximately between 50-60mm when translated to 35mm photographic terms. As it happens, the 55mm objective is also known as the "normal" objective, meaning the FOV is pretty much the same as the human eye. I use 50mm FOV in Poser and it works just fine for me. Also, all this is "in the eye of the beholder", apparently.(Yes, I DO have glasses...)