Here in the northern latitudes (58N), I have always found I need to
open at least one stop more than the "Rule" suggests. I assumed the lower
elevation of the sun was the reason. More dirty thick atmosphere to penetrate
means less light.
Has anyone seen any research on this subject? Perhaps a measurement of
the average foot-candles at solar noon for various latitudes would be in order.
Do I hear any volunteers? I would be willing to graph the data and superimpose
it over the waveforms of the Olympus shutter sounds to see if there is a
correlation.;)
Bob
----------
From: Tomoko Yamamoto[SMTP:tomokoy@xxxxxxxxx]
Sent: Tuesday, January 27, 1998 6:23 PM
To: olympus@xxxxxxxxxxxxxxx
Subject: Re: [OM] Nature's ND Filter?
At 09:32 PM 1/27/98 -0800, John Gardner wrote:
>Ken Norton wrote:
>>
>> I've been out photographing eagles this week and have been mystified
by my
>> meters.
>>
>> The Sunny-16 rule states that on a bright sunny day you can use F16
at
>> 1/ISO. I'm using Fujichrome 50 so that means that it should be
>> approximatily F16 at 1/60.
>>
>> Now here is the mystery: This winter, I've been running at least two
stops
>> down. This is confirmed by multiple cameras and processed slide
film.
>>
>I've always been skeptical about this rule, but John Shaw and Judy
Holmes
>swear by it. I often have to open up at least one stop from this and at
the
>weekend I tried it and I was also two stops down even though it was
bright
>winter sunshine and clear blue skies.
The last time I checked the sunny 16 rule I recall that the only area it
followed the rule was up in the sky.
>> BTW, the eagles are back. I've been able to get within 20 meters
without
>> any problems or using blinds. I came across six in one tree! ...oh,
for a
>> big lens...
>> Grr! You're telling me this to wind me up aren't you? I want to come
over to
>photograph eagles and owls about now but the wife reckons it'll be too
cold in
>Michigan or Maine. But she won't let me come on my own :( Women!
I know John Gardner will react to what Ken was talking about. If you
don't have to be particular about eagles and owls, there are a lot of
areas in the United States where wild birds can be photographed.
It does not have to be cold Michigan or Maine.
There are a lot of waterfowls south of here at the Chincoteaque. I once
participated in a bird-watching field trip to that area in early
December. There were plenty of Snow and Canada Geese. This past fall I
sighted a Great Blue Heron a few times when I was exploring a few streams
in the Baltimore area at which to do my fine-art photography.
Alternative to the US, might be Japan. Because of the north-south range
the country is spread, you'll find an interesting variety of Japan.
According to my wild bird book (in Japanese), two kinds of cranes will
come to southern Japan (where it is warmer) in the wintertime. These
cranes, <italic>Grus vipio and Grus monacha, </italic>are in Southeast
Asia only. The pictures I am looking at in the book were taken in
January and February.<italic> </italic>You know Olympus Japan has a
network of service centers, so you can visit one of those when you are
out there. Staying at a hotel in Tokyo is very, very expensive, but I
would think that staying in the farming areas of southern Japan won't be
as bad. If you are interested in either Japan or the eastern US, let me
know.
Tomoko Yamamoto
Photographer, Composer, Soprano
mailto:tomokoy@xxxxxxxxx
http://www.charm.net/~tomokoy/
-All the photos (except panorama) with OM's-
http://ep.com/ep/csp.html?csp=1130
-Olympus Equipment Classifieds-
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