Thanks Wayne. The article is very interesting. Now I'm going to have to
spend more money....sigh.
peace
David
>
> Moose's (as in Moose warming filters, not our resident moose) on 81a.
> http://www.moose395.net/gear/81a.html
> Perhaps most of you are familiar with this, but I never really understood it
> in a technical sense until I found and read this article earlier today.
> Someone on this list steered me toward using an 81a for color problems at
> high altitiudes. So on that reccomendation, when I was in Bolivia last
> month, at mostly altitudes between 8500 and 12,000 feet, I used an 81a
> filter (81b on the 35RC) on all my lenses all the time (except for the
> vivitar 17mm, for which I didn't have one to fit). I've been there five
> times previously, and this is the first time I've been able to get good
> results. I knew it worked for me, but not until today did I really
> understand it.
> Wayne
>
>
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