Pentax K20D manual 145, Using High-Speed Flash Sync Mode, Using in Wireless Mode

• P-TTL auto is only available with the AF540FGZ, AF360FGZ or AF200FG flash unit.

•The b will light in the viewfinder when the flash is ready (fully charged).

•For details such as operation method and effective distance, please read the external flash manual.

•The flash does not discharge when the subject is bright enough when Flash Mode is Cor i. Therefore, it may not be suitable for daylight-sync shooting.

•Never press the Kbutton when any external flash unit is attached to the camera. The built-in flash will hit the external flash. If you want to use both at once, see p.149 for the connection method.

Using High-Speed Flash Sync Mode

With the AF540FGZ or AF360FGZ, you can discharge the flash to take a picture at a shutter speed faster than 1/180 second. High-speed flash sync can be used with the flash attached to the camera, or wireless.

Attaching and Using the AF540FGZ or AF360FGZ on the Camera

1Remove the cover of the hot shoe and attach the external flash (AF540FGZ or AF360FGZ).

2Turn the mode dial and set the exposure mode to b or a.

3Turn on the camera and the external flash.

4Set the external flash sync mode to HSb (high-speed flash sync).

5Confirm that the external flash is fully charged and then take the picture.

• The b will light in the viewfinder when the flash is ready (fully charged).

•High-speed flash sync is only available when the shutter speed is faster than 1/180 sec.

•High-speed flash sync is not available when the exposure mode is set to p(Bulb).

Using in Wireless Mode

By using two external flashes (AF540FGZ or AF360FGZ) or using the built-in flash with an external flash, you can shoot in P-TTL flash mode without connecting the flash units with a cord. High-speed sync mode is also available for wireless shooting.

145

5

Using the

Flash

•Set the power switch of the external flash to [WIRELESS].

•Set the wireless mode of the external flash not directly connected to the camera to [SLAVE].