Nortel Networks P5100 user manual Shooting in P, S, A, and M Modes, Shutter Speed and Aperture

P, S, A and M modes

Shooting in P, S, A, and M Modes

P, S, A, and M modes offer control over a variety of advanced settings, including shutter speed, aperture, and white balance.

	Mode	Description
		Camera sets shutter speed and aperture for optimal
		exposure. Recommended for snapshots and in other
P	Programmed auto	situations in which there is little time to adjust camera
	(A46)	settings. Flexible program, which changes the
		combination of shutter speed and aperture, can be used
		(A46).
S	Shutter-priority auto	User chooses shutter speed; camera selects aperture for
	(A47)	best results. Use to freeze or blur motion.
A	Aperture-priorityauto	User chooses aperture; camera selects shutter speed for
		best results. Use to blur background or bring both
	(A48)	foreground and background into focus.
M	Manual (A49)	User controls both shutter speed and aperture.

DShutter Speed and Aperture

The same exposure can be achieved with different combinations of shutter speed and aperture, allowing you to freeze or blur motion and control depth of field. The following figure shows how shutter speed and aperture affect exposure.

			P, S, A and M modes
F	1/125	F4.3	17
Shutter speed			Aperture

Fast shutter speed:	Slow shutter speed:	Small aperture (large	Large aperture (small
1/1,000s	1/30s	f-number): f/7.6	f-number): f/2.7
			45