I am just photographing food plates. I have a Digital Rebel. I have an 18-55mm, a medium range canon (something like 80-200) and I have a Tamron 70-300mm which has a macro feature. Anyway, I've tried using the tamron to get close up photos of the food but I have to move back REALLY far...If I get too close, I can't get that blurred background effect. Well, I guess you can say I don't know how. What would you recommend I do? I normally shoot in auto but I'm guessing I need to go to one of the other manual ones like av, tv, etc...Any suggestions are appreciated. Thanks!