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<blockquote data-quote="WayneF" data-source="post: 355874" data-attributes="member: 12496"><p>For 60 people? You will need some ISO. The flash on the Nikon DSLR is pretty small (D7100 included). Guide Number is 39, ISO 100. That means power for ten feet at f/3.9, maximum. ISO 800 would increase to GN 110, or f/11 at ten feet, or f/7.3 at 15 feet, maximum. You may want to practice these numbers before.</p></blockquote><p></p>
[QUOTE="WayneF, post: 355874, member: 12496"] For 60 people? You will need some ISO. The flash on the Nikon DSLR is pretty small (D7100 included). Guide Number is 39, ISO 100. That means power for ten feet at f/3.9, maximum. ISO 800 would increase to GN 110, or f/11 at ten feet, or f/7.3 at 15 feet, maximum. You may want to practice these numbers before. [/QUOTE]
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