I haven't been as high as the Himalayas, but lived for a number of years
at 7000+ feet in Wyoming. The sky is naturally much darker blue than at
lower altitudes. This seems to be for several reasons: there is less
moisture to scatter light, and less air molecules to bend the light in
the visible spectrum.
A polarizer will indeed make the sky darker. Kind of like the photo of
the rocks at Joshua Tree National Monument on Joel's web page.
http://members.tripod.com/jdubikins/g3/g3pics.htm
So much UV passes through car windows one can get a tan with the windows
up. I always kept a UV filter on.
If no one else can help maybe Michael Stoesz can. mstoesz@xxxxxxxxxxx
He still lives in Laramie.
Gregg
"Chmielewski, Artur" wrote:
>
> Hi Everybody!
> Does anybody have experience making photos in high mountains? I mean
> *really* high - Himalayas. I've seen many photographs taken there
> overexposed, with black sky, etc.
> I have the following questions:
> <snip>
> 2. what about C-PL - I've heard it makes sky to dark - even black
>
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