Pentax 39554 *ist Manual - Page 113

111 ADVANCED OPERATION FOR THE BUILT-IN FLASH 1.When Using the Auto Picture and Picture Modes BASIC OPERATION (PREPARATION) • 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 BASIC OPERATION (SHOOTING) ADVANCED OPERATIONS • 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 OTHERS • 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.