And then there is global dimming. Not sure of its magnitude relative
to an F stop though. It may explain the popularity of LCD viewfinders
though. :-)
http://en.wikipedia.org/wiki/Global_dimming
Winsor
Long Beach, California, USA
On / March 15, 2008 CE, at 6:20 PM, Moose wrote:
> Chuck Norcutt wrote:
>> Actually, I don't know at what latitude sunny 16 might start to
>> fail in
>> a noticeable way. I would guess maybe at +/- 60-70 degrees or
>> thereabouts. Maybe some far north or south listee will tell us.
>>
> http://www.fredparker.com/ultexp1.htm#WHERE%20ON%20EARTH%20DO%20YOU%20LIVE
>
> Moose
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