P3D Sunny day at f11?

["Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

>From: gjw@xxxxxxxxxx (Greg Wageman)
   
>Sunny day, ISO 100, 1/100th shutter and *f11*?  Won't this result in
>every slide being a full stop overexposed?  Or more, if your 1950's
>camera's shutter is a tad slow, as many Kodak Stereo shutters in
>particular tend to be these days?  Why have you departed from the
>oft-quoted Sunny-16 rule, which would dictate f16 in this circumstance?

It is good to see that someone is paying attention!

There are a number of reasons and assumptions behind this recommendation.
The big assumption is that a Realist is used.  The Realist has a very
accurate shutter and I know a few people (some postings in P3d too) who
say that they prefer to use f11 instead of f16 and wonder if their
Realist shutter is too fast?

If only one setting is to be used, I think one f-stop under sunny day
is more appropriate, to compensate for things like haze, slight overcast,
late/early hours, side lighting, etc.  For a beginner with a dim viewer 
and the new contrasty films I think it is better if the slide is in the
lighter than darker side.

My friend Ken was getting very good exposures with f11 until he went to 
Texas on a very bright day and brought back overexposed slides.

On the other hand, if a Kodak is used with the notorious slow shutter,
then it is better, as Greg suggested, to use f16 and 1/ASA.

George Themelis


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