Shadownet: The reason for the altered camera lengths is to give you a more realistic look at your scene. I have my default Main and Face cameras both set at 100mm, leave the hands at 25mm, and then if I'm doing anything but a portrait shot, I'll reduce the Main to no lower than 75mm so that everything doesn't look "flat". Shorter than that and the figures start to distort and the depth of field gets all whacked. Take a look at a book on basic photography techniques to learn more about focal lengths. Too much to go into here for a complete explanation. And for that, I recommend "Photography for Dummies." Great book. To-the-point and easy to understand.