550 EX and 420EX

[jas1]

Hi,

I use a 550EX on my 10D. I also have a 420EX that I use as a slave.

Is there a way to use the 550 @ reduced power (sort of like a fill

light) with the 420 outputting full power as the main light off to

one side? I think that it can be done by placing the flash in manual

mode, but I would like to know if it can be done in "auto" mode to

retain TTL metering.

Thanks

Jas

[ted_sorensen1]

Yes you just need to set a ratio.

 

see you 550EX user manual and/or go to this site:

http://photonotes.org/articles/eos-flash/

[ted_sorensen1]

some excerpts copied from the manual:

 

"With slave unit A being the main flash and slave unit B being the fill flash, the flash ratio (A:B) between these two slave units can be set from 8:1 to 1:1 or from 1:1 to 1:8. (Thirteen 1/2-stop increments.)

 

On the master unit, press the < SEL/SET > button and select Ratio

Pressing the < SEL/SET> button changes the selection in the following loop:

Press the < - > button to select Ratio ON A:B. Ratio ON A:B will blink. Press the < SEL/SET > button again.....

[jas1]

Thanks Ted,

Than was exactly what I was looking for. Dunno how I missed it while fiddling with the unit.

Thanks a bunch

Jas