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- My experience using two 80-millimeter long-focus refractors
- GSO 8-inch TRUE CASSEGRAIN
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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.
Dec 11 2009 12:22 PM | FoxK in Other Solar Equipment
The DMK 21AU04.AS is a B&W cam from imaging source answering the call for an inexpensive cam that offers good performance for beginning imagers to moderate imagers on a limited budget
Oct 20 2005 07:52 AM | Guest in Other Solar Equipment
This is one observer's attempt to look at these eyepieces as objectively as possible and rate them "head to head". I've got good eyesight and see coma and other optical imperfections quite easily, so I think I gave
Mar 12 2005 12:37 PM | Guest in Other Solar Equipment
Since I bought the “Herschel Prisma” as Baader names it, one wonders what a “Prisma” or prism has to do with solar observing, well as a matter of fact, the Herschel is a peculiar type of prism that reflects about 4.6% of the light you pass through one of the prism faces that is flat to 1/10 of a wave, the rest that is 95.4% of light and heat goes into the prism and exits through the other face and out the backdoor of the housing, thus the excess light and heat is dispensed and not used for observing.