Pentax K20D manual Using the Built-in Flash, Compatibility of built-in flash and lens

60Using the Built-in Flash

If you wish to discharge the flash in a dark or backlit location, press the Kbutton to pop up the flash. Select a flash mode to suit your purpose from the Flash options screen in the Fn menu. You can adjust the flash output with the rear e-dial in any Exposure mode other than Green mode. The built-in flash is optimum at about 0.7 m to 5 m from the subject.

3 BasicOperations

Exposure will not be properly controlled and vignetting may occur when used at a distance closer than 0.7 m (this distance varies slightly depending on the lens being used and set sensitivity (p.141)).

Compatibility of built-in flash and lens

Vignetting (darkening of the corners of the image due to a lack of light) may occur depending on the lens being used and the capture conditions. We recommend taking a test shot to confirm this.

1DA, D FA, FA J, FA and F Lens Compatibility with the Built-in Flash (p.142)

• When using the built-in flash, remove the lens hood before shooting.

•The built-in flash fully discharges for lenses without a function to set aperture lens ring to s(Auto).

C Auto discharge	Discharges the flash automatically in dark or backlit
	locations.
Auto flash+	Lights a red-eye reduction light before automatic flash.
D Redeye reduct
E Flash On	Discharges the flash each time.
Flash On+	Lights a red-eye reduction light before discharging the
F Red-eye	flash with Flash On.
	Sets the shutter speed slower depending on the
G Slow-speed sync	brightness. Use this when shooting a portrait in front of
	a sunset or other scenery to capture both the person
	and background clearly.
Slow-speed sync+	Lights a red-eye reduction light before discharging the
H Red-eye	flash with Slow-speed sync.
I Trailing curtain	Discharges flash immediately before closing the
	shutter curtain. Capture moving images as if they are
k sync
	leaving a trail behind.
r Wireless Mode	You can synchronize a dedicated external flash
	(AF540FGZ or AF360FGZ) without using a sync cord.