Hi Ian,
<<a T32 + T32 = (32/2)+32 = 48
<<a T32 +T20 = (20/2)+32 = 42
Sorry that I feel like correcting you, but the official formula is:
Take square root of the sum of the squared guide numbers.
That gives 45 for the double 32, but 38 for 20 + 32. Not a big difference,
but it applies easily to multiple setups :
two 32 + one 20 = 49, how calculate your way?
perhaps 32 +(32/2)+ (20/4) could be used , gives 53
OK, thats easy to do without a calculator, and if you subtract the value of
the first digit in all cases of your calculation (in the examples given
here), you are very close . But i just tried it out with other combinations,
you may indeed be way off with these.
And if you build up a multiple flash system, you normally will also have the
time to do the correct calculation ( Or indeed use our beloved TTL?)
Regards
Rainer
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