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(IAAC) Ciel Extreme web site: filter article



Dear all,
An update to be found on Ciel Extreme's site (in french but with
interesting curves):
http://www.astrosurf.com/cielextreme/page250F.html
An article dealing with visual use of interference, color and polarizing
filters while deep sky observing: tests, comparisons and transmission
curves... in french but soon in english.
Happy reading and clear skies, Yann.
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
yann.pothier@fnac.net
http://www.astrosurf.com/cielextreme
http://astrosurf.com/skylink/publi/cielextreme
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