Pentax ist - Manual (Page 113)

111
B
ASIC OPERA
TION
(PREP
ARA
TION)
B
ASIC OPERA
TION
(SHOO
TING)
AD
V
ANCED OPERA
TIONS
O
THERS
1.When Using the Auto Picture and Picture Modes
• The camera automatically chooses an optimum combination
of shutter speed and aperture according to the ambient
brightness, allowing you to take a flash photograph with
ease.
• The shutter speed automatically changes to approximately
1/125 sec. or to a slower speed which does not cause
camera shake. The slowest shutter speed depends on the
focal length of the lens fitted to the camera. The slowest
shutter speed in the Night-scene program mode
is 1
second. When lenses other than an FA J, F and FA are used
or the Action program mode
is used, the shutter speed
is fixed to 1/125 of second.
2.Shutter-Priority AE Mode
• When taking a fast moving subject, you can increase a
subject blur effect. Any desired shutter speed 1/125 sec. or
slower can be set for taking a flash photograph.
• In this mode, the aperture automatically changes according
to the ambient brightness, making a flash photograph easy.
3.Aperture-Priority AE Mode
• When you want to change the depth of field or shoot any far away
subject, you can set the desired aperture to take a flash photograph.
• In this mode, the shutter speed automatically changes with the ambient
brightness. The shutter speed changes in range of 1/125 sec. to a
slower shutter speed that does not cause camera shake. The slowest
shutter speed depends on the focal length of the lens in use. When any
lens other than FA J, FA and F is used, the shutter speed is fixed to
1/125 sec.
ADVANCED OPERATION FOR THE
BUILT-IN FLASH