80tShutter Speed and ApertureP, S, A, and M modes offer different degrees of control over shutterspeed and aperture:Mode DescriptionP Programmed auto(0 81)Camera sets shutter speed and aperture for optimal exposure.Recommended for snapshots and in other situations in whichthere is little time to adjust camera settings.S Shutter-priority auto(0 82)User chooses shutter speed; camera selects aperture for bestresults. Use to freeze or blur motion.A Aperture-priority auto(0 83)User chooses aperture; camera selects shutter speed for bestresults. Use to blur background or bring both foreground andbackground into focus.M Manual (0 84) User controls both shutter speed and aperture. Set shutter speedto “bulb” or “time” for long time-exposures.D Lens Aperture RingsWhen using a CPU lens equipped with an aperture ring (0 194), lock the aperture ring at theminimum aperture (highest f-number). Type G lenses are not equipped with an aperturering.A Shutter Speed and ApertureThe same exposure can be achieved with different combinations of shutter speed andaperture. Fast shutter speeds and larger apertures freeze moving objects and softenbackground details, while slow shutter speeds and small apertures blur moving objects andbring out background details.Fast shutter speed(1 / 1,600 s)Slow shutter speed(1 s)Small aperture (f/22) Large aperture (f/5.6)(Remember, the higher the f-number, thesmaller the aperture.)Shutter speed Aperture
