Canon multiple Speedlight ratios

greenspun.com : LUSENET : Canon EOS FAQ forum : One Thread

Is there an easy way to calculate the proper ratio when using the master/slave capabilities of trhe EX series flash system?

-- Marshall Stephenson (jedijumper@beaufortco.com), August 18, 2001

Answers

You don't really "calculate" the ratio, you set it. For portraits, for example, you might want the fill light two stops less than the main light. But it's not nearly that simple since the distance from fill to subject will have an effect. Best thing to do is to put both flashes on manual and use a flash meter to set the power level that you desire.

Paul

-- Paul Ferrara (paul@columbusoft.com), September 02, 2001.


Moderation questions? read the FAQ