ng end the aperture is too low, the ef 24-105 has a constant aperture with a very long end but I dont know if 24mm which is the full frame equivalent of 38.4mm on a canon crop frame is wide enough.Whats more important to me is my ability to shoot close subjects in low light which is natural light, such as evenings and cloudy days without using flash, to me flash is not natural light!The long end o