In a message dated 3/26/99 3:28:32 PM EST, farrar@xxxxxxxxxxxx writes:
<< For those who just have to know:
Let SN = 1 when square N is shiny, SN = 0 when not
S1 is always 1
A = S2 + 2*S3 + 4*S4
B = S5 + 2*S6
ISO = 25*2**A + (2**(1/3))*(B-1)
Notice that this scheme helps with cheapo cameras.
You can detect the multiples of 25 by sensing three squares.
100, 200, 400, and 800 by sensing 2 (S2 & S4).
And for real cheapos, decide between 100 and 400 by sensing only S4.
Paul
>>
Paul,
I assume this explains how to do exposure compensation for DX only
cameras?
Maybe I'm thick headed, but I don't follow what the above means. Could
you
possibly explain it more? Maybe type it a little slower ! :)
Thanks
George S.
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