There was a long thread on high altitude photography started by Wayne's
questions about getting better results on the altiplano of Bolivia on
his upcoming trip than the last one. I suggested that a UV filter like
Wayne was using is insufficient at real high altitude and a 1A should be
better. Another listee who shoots in the Rockies went further and said
an 81A or 81C is needed because the weaker filters still let a lot of UV
in and some films are more sensitive to UV than our eyes. Someone
pointed out the Moose filters (no relation) which simply combine an 81A
with a polarizer. There is a web site
<http://www.moose395.net/gear/moosefltr.html> which explains it, but
they are available cheaper elewhere on the web. Also, other
manufacturers now make the same thing.
Moose
John Hudson wrote:
I came across a selection of "Moose's Warming Polarizer" filters at
our local photo store this morning. The warming element is shown to be
equivalent to an 81A filter and the polarizer is circular and not
linear.
Does anyone use these filters and can comment on their experience and
well as the kind of lighting situations in which they would be useful?
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