I am a total noob here and to photography and am looking for some expert advice. I have a few questions on how to take good close up shots of products for my clients. I just bought an Olympus Evolt 330 with a stock lens kit but do not have any special lens or filters. I do have a tripod though. I also built my own photo tent or light box out of white nylon and the pieces I put in this box look really great and well lighted. However, my pics are coming out kind of dark and yellowish. I have been trying different ISO settings,flash/no flash, and scene settings besides macro but still am having the same issue. The flash does make things better but is too harsh. Anyway, I am looking for some pointers on what to set my camera at and what I need to do to get better quality close up shots without spending a ton of money on a high end lens. I guess the lighting issue is my biggest hang up right now. I just don't understand how something so well lit and bright ends up looking yellowish and dark. PLEASE HELP!