I have a lot more, and just wanted to list a handfull.
Enjoy!
Thursday, September 24, 2009
Speedlights + Iphone = Easy
Usually I just wing it when it comes to shooting with my speedlights. Power up, scoot 'em back, adjust my aperture a tad......Hold on one more shot. I can get pretty close in around 3-5 shots.
But sometimes you want to nail it. you don't want to dork around with all that. This is where most will say, "get a flippin light meter!" I know, there is just other gear I would rather have.
Anyway, Emmet Photography did some great research where he tested the actuall guide numbers for the Canon 580ex, and 430 ex seperate and firing together and made handy little charts with guide numbers for different flash zooms and powers.
Days Later.......
I find the neat little Iphone app called PhotoCalc.
So I plugged in a few numbers, Aperture, ISO, distance to subject, and the guide number for the appropriate zoom on my speedlight and it spit out Flash power = 1/16.
I shot a variety of test shots from different distances up to 20 feet and different subjects, and they all came out perfectly exposed. I even used a shoot thru, and a stofen, and used the numbers from his deductions page and they were perfect.
Good Luck!
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