> I know this was previously discussed but, I came across an "F-stops
> Incremental Chart" taken from the "Nikon School Handbook" and found out
> that an +1/2 stop increment over f1.4 is f1.7 and not f1.8! Beeing an
> EOS "1/2 stop cameras" owner all my life (I moved to the EOS 3 recently)
> it came as a shock to me, to find out that my beloved EOS 1000FN, 600
> and 5 were displaying an +2/3 stop increment over f1.4and not an 1/2
> stop (neither does my EOS 3 in 1/2 stop increments mode, for the
> matter)! To make things more confusing, they show +1/3 stop over f4.0
> and so on. They almost never display the true 1/2 stops. I'm I missing
> something here? If there is an answer to this question in the list
> archives, please kindly tell the approximate date when this was
> discussed and I'll go search for it. If not, can someone explain this?
I'd say not a big deal. Actually the right answer is not 1.7, but 1.6:
sqrt(2)^sqrt(2)=1.63...So in every case all these numbers are approximations. 1
stop over 2 should be 2.7 (2.66). Think about the shutter speeds: 1/4, 1/8,
1/15!. 1/60,1/125! So in every case your pictures are ruined :)
Severi
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