That's pretty much the same as a film camera shooting negative film.  
Sunny 16 is really closer to sunny 11.
Paul
On Feb 19, 2007, at 8:53 PM, J. C. O'Connell wrote:

> I am finding my istDS isnt really full ISO
> speed when using the "sunny F16" mode of
> exposure. For example, when I use the DSLR camera
> set at ISO200 (which I use most of the time),
> I usually get my best "sunny f16" exposures at EI 160
> (1/[EMAIL PROTECTED] or equiv.). Thats not too bad really. Since I
> know this now, I can get pretty close by
> guesstimate techniques I have used for years
> and then tweek/bracket as needed, all in manual
> mode.
>
> Anybody else notice or test their camera for
> this "sunny f16" rule and what EI are you getting
> for the DSLR camera set to ISO200?
>
> jco
>
>
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