I have absolutely no idea how to use the Canon T2i, I'm still reading the manual as to what each mode does and what the differences are. I have a 40cm x 40 x 40 white cube to take product photos in with two 50W "day" globes. I can't for the life of me, get a perfect white background. I believe the EV is to blame, the camera most likely under exposes due to the amount of whites. How do I set this EV? Does anyone know how to, step by step instructions on a Canon T2i? The manual doesn't have it anywhere! Would really appreciate ANY help or comments.