From: Roland Roberts <roland
Date: Wed, 15 Mar 2006 09:26:39 -0500

>>>>> "Shawn" == Shawn Dvorak <sdvorak

    Shawn> I use the Astrodon/Schuler V filter and see pretty severe
    Shawn> deterioration over a single season.  Of course, the Florida
    Shawn> climate is undoubtedly a tad hard on the filter, though I
    Shawn> have started shuttering the observatory during the warm,
    Shawn> rainy summer months, bringing the equipment into the air
    Shawn> conditioned house so it no longer has to suffer the worst of
    Shawn> the weather.  I've not actually replaced the filter over the
    Shawn> past two years, however, since I've gotten satisfactory
    Shawn> results by cleaning the deposits off with cerium oxide from
    Shawn> an old mirror polishing kit.  A few minutes of cleaning with
    Shawn> a bit of water and gentle pressure with a thumb/finger is
    Shawn> sufficient to remove the whitish film.  Of course, over time
    Shawn> the filter will end up some scratches, and perhaps the color
    Shawn> balance will shift a bit as well, but I hope to get a few
    Shawn> more years out of this inexpensive filter.

and I'm trying to image what sort of deposits we're talking about.

roland
                       PGP Key ID: 66 BC 3B CD
Roland B. Roberts, PhD                             RL Enterprises
roland
roland
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