Using The Exposure Mode And Other Functions - Pentax Optio A40 Operating Manual

Using the Exposure Mode and Other Functions

(Program mode),
Exposure mode) allow you to take pictures with various aperture and
shutter speed settings (Exposure modes).
Program
Shutter Priority Set shutter speed manually. Aperture is set automatically.
Manual
Exposure
Effect of Aperture and Shutter Speed
There are many correct combinations of shutter speed and aperture for
a particular subject. Different combinations produce different effects on
a picture.
Slower shutter
speed
Faster shutter
speed
Smaller aperture
value
Higher aperture
value
(Shutter Priority mode) and
Sets shutter speed and aperture automatically for proper exposure.
Set both shutter speed and aperture manually.
The shutter remains open for a longer time. If the subject is moving,
the image will be blurred while the shutter is open, thus enhancing the
effect of motion.
The shutter remains open for a shorter time. It allows freezing the
action of a moving subject.
Decreases the amount of light which enters through the lens.
Increases the amount of light which enters through the lens.
Shutter release button
Four-way controller
OK button
(Manual
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