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tests done for max flash power -SB900 SB700 yongnuo 560III
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<blockquote data-quote="aroy" data-source="post: 316237" data-attributes="member: 16090"><p>Very interesting test.</p><p></p><p>What interest me is what is the full power output at working distance and the computed guide number. So I would set the meter at a suitable distance 5-10 meters depending on space, set the zoom at 35mm and then fire it at full power. To be doubly sure, I would try at various distances - 1, 2, 4, 8, 10 meters. After that I would use the program mode to see how well it works.</p><p></p><p>Another method if you have no meter is to use the DSLR. Set a target at 5 to 10 meters, and vary the aperture to get varying power in TTL mode. Then compare the histograms.</p><p></p><p>Once I get the measured guide number, I would then test for</p><p>a) Recycle time over the life of the battery</p><p>b) Battery life</p></blockquote><p></p>
[QUOTE="aroy, post: 316237, member: 16090"] Very interesting test. What interest me is what is the full power output at working distance and the computed guide number. So I would set the meter at a suitable distance 5-10 meters depending on space, set the zoom at 35mm and then fire it at full power. To be doubly sure, I would try at various distances - 1, 2, 4, 8, 10 meters. After that I would use the program mode to see how well it works. Another method if you have no meter is to use the DSLR. Set a target at 5 to 10 meters, and vary the aperture to get varying power in TTL mode. Then compare the histograms. Once I get the measured guide number, I would then test for a) Recycle time over the life of the battery b) Battery life [/QUOTE]
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tests done for max flash power -SB900 SB700 yongnuo 560III
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