Very nice Mark! Yes it isn't 60km, but still very impressive!! Ah well since I don't have a f1 lens it doesn't really count for me, but still..


I just kept on thinking about it myself and just had to look it up [:P] And yes you're right!


But then the other way around isn't right as well. What I said earlier:



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Quote Originally Posted by Sheiky
When you have a GN of 58m (580 flash) at f1 iso 100, and you put it at f1.4 (1 stop higher) the range would be 29m, am I correct?

That just wouldn't be correct then, wouldn't it? That should be quadratic as well. Or am I missing something important now?


Jan
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