From: Larry Colen
Last week I did a quick photoshoot of a friend who's an aspiring actor
that wanted a headshot. I had my AF540 on a tripod, and was
controlling it wirelessly from my K20.

There were several times that I wanted to turn the on camera flash
down to almost nothing, just using enough for control, or maybe a
little bit for fill. The K20 manual was nearly useless.

How does one set ratios between on camera and off camera flash when
shooting wirelessly?

It talks about using two AF540 or AF360 flashes, but I shouldn't need
to spend an extra $300 to do this.

It looks like you can use the built in flash with an AF 540FGZ or AF 360 FGZ in Contrast Control flash mode. It will always give a 2:1 ratio External Flash : Built in Flash.
[P 150 in the PDF K20D manual]

If you're just using the built in flash to control the external flash, line 29 in the Custom Setting menu should allow you to turn the built in flash "OFF", i.e. used only as a test flash to control the external flash).
[P 146 in the PDF K20D manual]



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