Posted: Wed Sep 17, 2014 8:31 am Post subject: How to sum up flash guide numbers? |
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CuriousOne wrote:
Hello.
Say I have flash with GN of 17. If I add another flash with GN17 next to it, what will be the output power? according to wiki, to double GN, you need to quadruple the flash power. this means, with two flashes I'll be getting 17+17/2=25 ? _________________ I have nothing to compensate with lens |