fair comment too ......

At 5.6 you just gotta be mindful of DOF too. This is of course dependant on focal length, and distance to subject as well. At 1/4 or 1/2 power your usually at around f11-f16ish (depending on distance of course) so youre almost guaranteed sharpness across the frame. Of course if you want blurry bits, like Nellies shot, 5.6 would be just about bang on