Band-Pass Filters For Visual & Video Astronomy ( http://www.arizonaskys.com/downloads/Band%20Pass%20Filters%20For%20Visual%20&%20Video%20Astronomy.pdf )
by Jim Thompson, P.Eng March 2011
http://www.arizonaskys.com/downloads/Band%20Pass%20Filters%20For%20Visual%20&%20Video%20Astronomy.pdf
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Il n’existe rien qui fasse obstacle à l’infinité des mondes. Épicure(341-270 av. J.C.)https://dso-browser.com/profile/stephane_lem
https://www.flickr.com/photos/stef-astro/
http://stef-astro.wix.com/astro AstroNamur Site d'observation de Ramillies
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