Pentax K-7 Operating Manual page 107

Theshutter speed andaperture v alue aredisplayed onthestatus s creen
andLCDpanel a ndintheviewfinder.
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t Turn the iear eidia! (',,,_,,€)While pressing the [] button to Change the EV
compensation va!ue. (p,!15)
, Set the shutter speed and aperture values in increments of 1/3 EVor !/2 EV,
Set the exposure steps in [1: EV Steps] in the [O Custom Setting 1] menu.
(p.116)
, !n TAr mode, the sensitivity is fixed to [AUTO].
Exposure Warning
If the subject is too bright or too dark, the
sensitivity will blink on the status screen
and LCD panel and in the viewfinder. In
this sort of situation, change the shutter speed and aperture. When
the indication stops blinking, you can take the picture with proper
exposure.
Use a commercially available ND (Neutral Density) filter if the subject
is too bright. Use a flash if it is too dark.