Mike wrote:
>>At altitudes of 8 to 12,000 feet, a polarizer turns the blue sky almost
>>
>>
>black, Indeed it does, especially so when exposed for the bright sun. Below
>is about 5800m. poor scan but you can see the effect. I use a polarizer on
>telephoto lenses but wides are nearly useless with a pol. due to the weird
>skies they produce
>http://www.interisland.net/watershed/mike/LatinAmerica/CordilleraBlanca/paron.jpg
>
>
Brrrrrr.....
Might be nice to helicopter in on a nicer day
<http://www.moosemystic.net/Gallery/Brrrrr.htm>.
The bottom image is what about an 81c filter should do at 19,000
ft/5,800 m.* Nothing that tall up your way, Ranier is 14,410', where is
this?
Moose.
* Although it won't add clouds. :-) .
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