- Hubble Optics 14 inch Dobsonian - Part 2: The SiTech GoTo system
- iStar Optical’s Phantom FCL 140-6.5 review
- Who’s Afraid of a Phantom: Istar Phantom 140mm F/6.5, that is?
- SHARPSTAR 94EDPH APOCHROMATIC REFRACTOR
- My Losmandy G11T review
- FIELD TEST: THE NOH CT-20 ALT-AZ MOUNT
- SkyTee-2 Alt/Az Mount Review
- SharpStar Askar ACL200 200-mm f/4 astrographic telephoto lens
- A review of the Unistellar EVscope
- Astrotrac 360 tracking platform – first impression
- FIELD TEST: CARL ZEISS APOCHROMATIC & SHARPEST (CZAS) BINOVIEWER
- Omegon 32mm 70º SWA eyepiece review
- Review of iPolar hardware and software for polar alignment
- Review of the Hubble Optics 14 inch, f/4.6 Premium Ultra Light Dobsonian Tele...
- My experience with the Starizona Landing Pad
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.
Oct 30 2009 06:15 AM | Guest in Astronomical Filters
My interest in astronomy started when I was 15 and saw Haley¡¯s comet through a pair of Bushnell binos. I had always wanted to buy a telescope but growing up in light and particulate polluted Bombay (now Mumbai), I gave up all notions of pursuing the hobby
Mar 29 2005 03:34 AM | Dave Novoselsky in Astronomical Filters
Markus just sent me a rather interesting item on the basis of, "test it, and if you like it, keep it and send me a check. If you don't like it, send it back to me." The sheet that accompanied the small box says this is a "BAADER PLANETARIUM MOON & SKYGLOW FILTER." The literature says that it is a 1.25" filter designed to thread into a standard 1.25" eyepiece and "not a simple colored filter" but a "selective contrast filter" intended to block "in the visual spectral ranges" light from sky and street lighting. It is also said to increase contrast on lunar and planetary observing but preserve "bright-dark contrast." Markus said that, unlike most color filters, this filter is optical glass, not simple colored glass, and has "flat-parallel polished surfaces."