You were right Wayne! Thanks
But values are OK? Olympus with 50/1,2 put -6.5-->19
into the catalog, why?
Dave
Wayne Shumaker wrote:
>
> correction in your formula, missing log
>
> EV = 3.322*LOG(f²/t) (log base 10)
>
> or
>
> EV = ln(f²/t)/ln(2) = 1.443*ln(f²/t) (natural log)
>
> derived from 2^^(EV) = f²/t
> (read 2 to the power of EV equals f-stop squared / time)
>
> Wayne
>
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