Pentax AF 540 FGZ II Bedienungsanleitung

The effective flash range will be displayed on the LCD panel of

this flash unit. Make sure that you are within the effective flash

range before taking pictures.

• The effective flash range is displayed for the following

camera and lens combinations.

• The flash effective range varies depending on ISO, lens

aperture in use, and/or the zoom position (flash coverage

angle). Keep this in mind especially when you are using

a variable aperture zoom lens.

Guide Number (GN)

Guide numbers indicate flash light intensity. The larger the

number, the farther you can reach with your flash. From the

guide number, you can easily obtain the proper aperture setting

required for an optimum exposure.

• Depending on the camera and lens you are using, the

effective flash range may be displayed. (Refer to page 57.)

Display of Effective Flash Range

Camera

Lens Types

K series (APS-C)

DA, D FA, FA J, FA, F, A

645D

DA645, D FA645, FA645, A645

Q series

Q Mount Lens

Aperture (F/stop) =

GN/flash-to-subject distance (m)

Effective flash range

AF360FZ_540FGZ.book Page 57 Friday, December 20, 2013 6:11 PM