Pentax K20D - Manual (Page 84)

83
Shoot
ing Funct
ions
4
Automatically sets shutter speed and aperture to the proper exposure
according to Program line when taking pictures.
1
Set the mode dial to B.
2
Confirm the shutter speed and aperture in the viewfinder
or on the LCD panel.
Using the B (Green) Mode
Shutter speed, aperture, AE lock, EV compensation, Auto bracket, Multi-
exposure, and Flash exposure compensation cannot be set in B (Green)
mode.
Set the aperture to the s position while
holding down the auto-lock button when
using a lens with an aperture ring.