I've got an old Canon FTb which I just had cleaned and some parts replaced on it. It's working great now. I want to give the camera to my daughter but I would like to purchase a few additional lenses for it. Right now it has a 35mm on it. As I understand it, it takes FD based lenses. Can I use any FD lenses or do I need to find lenses specific to this mount? I am only interested in purchasing a few cheaper lenses on ebay for the camera as this is for a 14 year old girl and will probably get littleuse or harsh use. Any help is appreciated.