109Zg: Aperture-Priority AutoIn aperture-priority auto, you choose the aperture while the cameraautomatically selects the shutter speed that will produce theoptimal exposure. To take photographs in aperture-priority auto:1 Select exposuremode g.Press the I buttonand rotate the maincommand dial until g isdisplayed in theviewfinder and controlpanel.2 Choose an aperture.Rotate the sub-command dial whilethe exposure metersare on to choose thedesired aperture fromvalues between theminimum and maximum for the lens. Small apertures (high f-numbers) increase depth of field (see page 105), bringing bothforeground and background into focus. Large apertures (lowf-numbers) soften background details in portraits or othercompositions that emphasize the main subject.Small aperture (f/36) Large aperture (f/2.8)I buttonMain command dialSub-command dial
