I need some advice on what lens to use when taking closeup of food in a dimly lit restaurant. I would prefer the front half of the food to be in focus then blurring out to a nicely to the back of the plate. The 12/14 are too wide and I can't get close enough to fill the frame. The 14-42 and 40-150 zooms cranked the ISO so high, the sharpness and color was not good. Maybe it has to do with the photographer and not the lens. What do you use to get nice sharp closeup of food? Thanks in advance.