Applying The Sunny 16 Rule To Strobes And Mid Day Shooting

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The Sunny 16 Rule is a great addition to any photographer’s toolbox. Basically it means that when shooting on a sunny day @ISO100 you’d be pretty close if shooting @1/100 and f/16. It is a clever rule because it is very easy to remember. 100 @ 1/100.

Photographer Neil van Niekerk points out that it is pretty easy to complement this rule when trying to overcome the sun with an external strobe. And his method means you can get a great exposure with no metering. The idea is pretty simple: setting your strobe to full power and using the strobe’s GN (Guide Number) to figure out where to place the strobe. This would get a pretty good first exposure.

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Making Sense of Your Flash’s Guide Number

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If you’ve been reading my posts here at DIY Photography for a while, you probably already know that I generally don’t spend too much time on some of the more technical aspects of photography. I’ve covered legal issues, written some fun reviews, and put some myths to rest, but I pretty much spend most of my time here howling at the moon. Okay– maybe not literally howling at the moon, but the opportunity to share whatever random thoughts have been bouncing around in my head a couple of times each week is a privilege I don’t take lightly– even when I’m ranting. I’ve decided that today’s going to be a little bit different. Today we’re geeking out and deciphering one of the greatest photographic mysteries of all time– your flash’s guide number.

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