Hello all just a quick few question that i am sure you get ALL the time so i am sorry to ask it again lol but i know if you go up in f stops you have to go down just as many in shutter speeds ( i think ) but what i want to know is how do you pick the f stop ,does it come down to what you want in focus ? like picking a large aperture to blur the back ground or a smaller one for more detail and 2) is there a formula to help get the shutter speed to match your aperture ? IE: say at random i pick an aperture of 5.6 how would i know the shutter speed ? or does it matter i know faster shutter speeds stop motion , but does that also mean i would get greater detail ? or vise versa would i use a slow shutter speed for better detail ...or does it all depend on your meter readings ????? P.S. When it comes to Macro whats better ? i seen a lens with a macro ratio of 1:2 and also i seen one that was 1:3.9 LOL i'm so lost !!!!