Pentax K-5 Operating Manual page 13

About the Display Panel for AF360FGZ
The AF360FGZ itself does not have the function to set the FORMAT size
to [DIGITAL]. However, when it is used with a SLR Digital Camera, the
difference in focal length between a 35 mm camera and the/_-5 is
automatically calculated based on the difference in angle of view and is
displayed on the panel (when using DA, DA L, D FA, FA J, FA or F lens).
The conversion indicator appears and the FORMAT size indicator
disappears when the exposure metering timer of the/C-5 is on (it
returns to 35 mm format display when the exposure metering timer is
turned off).
I 85mm 28mrn 2" I _..
LensFoca Length i77mm. 50rnrn. 35rnrn /24mm •
umml I_rnm
Exposure metering timer 85mm 70mm 50mm 35mm 28mm 24mm*
Off
Exposure metering timer 58mm 48mm 34mm 24mm 19mm 16mm*
On
* Using wide-angle panel
Using P-TTL Auto Mode
You can use [P-TTL Auto] with the AF540FGZ, AF360FGZ, AF200FG or
AF160FC flash unit. The flash pre-flashes before the actual flash and
confirms the subject (the distance, brightness, contrast, whether it is
backlit, etc.) using the camera 77-segment metering sensor. The flash
output for the actual flash is adjusted based on the information obtained
from the pre-flash, enabling flash photography with more accurate
exposure for the subject than with normal TTL auto.
I Remove the cover of the hot shoe and attach the external
flash.
2 Turn on the camera and the external flash.
Set the external flash mode to [P-TTL Auto].
Confirm that the external flash is fully charged and then
take a picture.