"What aperture are you shooting at? You probably already know it, but for landscapes you'd be looking at f/5.6 or so unless you're hurting for light."
this is bad advice.... shoot on a tripod and set your f stop to get the DOF you need or do a focus stack, f/5.6 would work if your shooting a distant landscape but having anything in the foreground f5.6 would not be enough, i usually stay at around F10 any higher i don't like because diffraction starts to reduce image quality and if i need more DOF i just focus stack
for ISO set it to 100 or what ever your cameras base ISO is
then adjust your shutter speed until you get correct exposure