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CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.
Aug 16 2014 03:05 PM | rford322 in Telescope Articles
My first impression is excellent. The WO Star 71 has a wide, well illuminated, flat field of view, exactly what I was looking for.
Dec 21 2013 06:33 AM | RealSorin in Telescope Articles
Buying your first telescope can quickly become a daunting task when faced with so many choices and unfamiliar terms. Hopefully this article simplifies the process a bit for you.
Sep 18 2009 05:10 AM | mwedel in Telescope Articles
When I was 12, a friend brought a telescope catalog to school. It was from Celestron. It was the first time I'd ever heard of a Schmidt-Cassegrain. I borrowed it, kept it for a couple of weeks, read it cover to cover until I had large swaths of it memorized.
Sep 01 2009 06:24 AM | Crayfordjon in Telescope Articles
During research into retrofocally corrected refractor systems, I noted an effect during experiments with an optical bench cum telescope apparatus, that is, when the correcting flint element was removed from the train, the image recovery lenses still formed a back focus image which was smaller but seemed well corrected for colour, in fact it was a better correction than was being had with the flint lens in situ for that particular array