The above photo was captured during the evening of June 15, 2011 when I was waiting for the lunar eclipse. A Canon EOS 400D camera was attached to the Celestron Nexstar 4 inch Maksutov telescope in prime focus mode.
Posts Tagged ‘telescopes’
The beautiful Sun
Posted in Astronomy, Astrophotography, Photo, tagged solar, telescopes on June 22, 2011 | 1 Comment »
Telescopes: basic parameters
Posted in Astronomy, Terminology, tagged telescopes on January 26, 2011 | Leave a Comment »
It happens quite often to ask if a specific telescope can “show” a certain object with given magnitude. For this reason, it is useful to keep in mind a few simple relations giving the basic properties of telescopes.In this post, I explain three parameters: Limiting magnitude, resolving power, and the magnification. Limiting magnitude is the [...]
Why do I love CATs?
Posted in Astronomy, Terminology, tagged telescopes, wiki on January 23, 2010 | Leave a Comment »
A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric combinations are used in focusing systems such as search lights, headlamps, early lighthouse focusing systems, optical telescopes, microscopes, and telephoto lenses. Other optical systems that use lenses and mirrors are [...]
