What is a good battery grip for a Nikon D40, where you can turn you're camera from horizontal to vertical for things such as portrait shots? I want to get a nice one that is a good, affordable price. Note I am 16 years old, with big dreams of becoming a professional photographer. I am trying to look into buying some new equipment, but I haven't learned what are the best products for the best price for my D40. Any help would be much appreciated! I am looking into buying a Nikon SB-600 external flash, a Nikon 55to 200mm VR lens, and a battery grip for portraits. All at different times of course! I just wnat to start making a list of equipment I'll need