Pentax K-7 Operating Manual page 52

• When taking a moving subject, you can use the flash to change the blur
effect.
• Any desired shutter speed 1/180 seconds 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 seconds when a lens other than
DA, DA L, D FA, FA J, FA, F or A is used.
• You can set the desired aperture 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 seconds
to a slow shutter speed (p.64) 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 seconds when a lens other than
DA, DA L, D FA, FA J, FA or F 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 shooting slows the shutter speed. Use the Shake
Reduction function or turn off the Shake Reduction function and use a tripod
to avoid camer a shake. The picture wi!! a!so blur if the subject moves.
, Slow-speed Sync shooting can also be performed with an external flash.