Re: Sunny 16 Doubter (digest 1597)

[P3D Gregory J. Wageman <gjw@xxxxxxxxxx>]

Bob Howard writes:

>RE: Greg W. speculates about LA Smog, volcanic eruptions, alpine heights
>etc. as something that would defeat Sunny 16 rule. The rule says Clear
>Sky..not smog ridden, or filled with volcanic dust.

And the exponents of Sunny-16 advocate using the table that comes on
the film boxes as a guide for deviating from Sunny-16.  Last time I
looked, there wasn't an exposure adjustment recommendation for smog,
volcanic eruption or high altitude.  So what's the novice to do?  Not
take pictures?  No!  Whip out the trusty meter!  All lookup tables
conveniently built-in!

>The illumination from a distant sun is constant within close limits
>for the time limits of 10am to 3pm (found on most exposure sheets too.)
>Agfa did a world wide study of light variations in designing soem
>simplified cameras and found the variations of intensity were not great.

I've gotten private correspondence from a list member who says he has
a book prepared for the Navy by the ASA listing the appropriate exposure
compensation for just the conditions I mentioned.  However, I've not
received permission to repost it.  Perhaps Charlie Hotchkiss would like
to comment here?

Charlie?

	-Greg


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