Pentax K-5 Operating Manual page 7

• When taking a moving subject, you can use the flash to change the blur
effect.
• Any desired shutter speed of 1/180 sec. or slower can be set for taking a
flash photograph.
• The aperture value automatically changes according to the ambient
brightness.
• The shutter speed is locked at 1/180 sec. when a lens other than a DA,
DA L, D FA, FA J, FA, F or A lens is used.
• You can set the desired aperture value to take a flash photograph when
you want to change the depth of field or shoot a subject farther away.
• The shutter speed automatically changes with the ambient brightness.
• The shutter speed shifts automatically anywhere from 1/180 sec. to a
slow shutter speed (p.70) that reduces camera shake. The slowest
shutter speed depends on the focal length of the lens in use.
• The shutter speed is locked at 1/180 sec. when a lens other than a DA,
DA L, D FA, FA J, FA or F lens is used.
Using the Slow-speed Sync
You can use slow-speed-sync in Tv (Shutter Priority) mode when shooting
portraits with the sunset in the background. Both the portrait and the
background are captured beautifully.
, Slow-speed Sync slows the shutter speed. Use the Shake Reduction function
or turn off the Shake Reduction function and use a tripod to avoid camera
shakel The picture will a!so blur if the subject moves I
, Slow.speed Sync shooting can also be performed with an external flash: