[Aavso-photometry] BVRI Filter Degradation...Another Report

[Donn Starkey]

I had the chance to remove the filter form my CFW-8 filter wheel this evening.
Because of all of the discussion about filter degradation, and Arne's talk at
the Fall Meeting, I took pictures of each side of the filters to show their
condition.  These are Custom Scientific BVRI filters that have been out in the
observatory for 9+ months.  The observatory is unheated, naturally, and the
filters were given no unusual attention.  The filter wheel and camera are kept
attached to the scope full time.  There is no obvious degradation of the
filters.  I have posted pictures of the filters at the URL's below.

http://www.starkey.ws/FTP%20Page/DSCF1064.JPG
http://www.starkey.ws/FTP%20Page/DSCF1063.JPG

Please let me know if you have any questions.

Donn
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Donn Starkey
starkey73 at mchsi.com
http://www.starkey.ws
AAVSO Observer SDB  -  CBA Indiana
VSNET Observing Team  -  MPC Code H63
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