- 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.
Optical Theory Archives
Nov 25 2011 10:44 AM | Tim Neubert in Optical Theory
For this comparison we conclude that Carl Zambuto's seven criteria must be providing the extra contrast that was observed at the eyepiece.
Author name: Tim Neubert
Dec 08 2009 07:46 AM | MitchAlsup in Optical Theory
Control of stray light is very important in telescope design and construction. This article looks at many of the issues involved
Author name: Mitch Aslup
Sep 01 2009 07:15 AM | Chris Lord in Optical Theory
The Fraunhofer diffraction pattern produced by any particular aperture or obstruction placed across that aperture can be modelled using a Fourier Transformation
Author name: Chris Lord
May 16 2009 05:24 AM | Guest in Optical Theory
Curious about how different designs compare as per aperture? Forum member Jared Willson shares his thoughts...
Author name: Jared Willson
Jul 19 2006 09:12 AM | Cary in Optical Theory
I continually see statements of “diffraction limited optics” in the industry and this generates an astounding amount of discussion to exactly what this is and what it means.
Author name: Cary Chleborad
Mar 10 2006 03:09 AM | Darren Drake in Optical Theory
In the realm of naked eye astronomy it has always been considered one of the greatest challenges to view the crescent phase of Venus
Author name: Darren Drake
Jan 25 2006 01:54 AM | Darren Drake in Optical Theory
I have been an amateur astronomer for about 30 years and have owned many telescopes
Author name: Darren Drake
Jan 09 2006 02:19 AM | Starman1 in Optical Theory
In today's eyepiece market, there is a lot of confusion about eyepiece characteristics and problems.
Author name: Don Pensack
Mar 12 2005 11:44 AM | Guest in Optical Theory
Neither mirror nor prism are better. If you notice, every manufacturer of quality scopes with fast focal ratios uses mirror diagonals. Every manufacturer that sells quality scopes with long focal ratios sells prism diagonals. It’s not an accident. You get the diagonal that matches the scope.
Author name: Gary Hand