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From microscopes to telescopes, rifle scopes to night vision, eHow’s got the optics information you’re looking for. In the market for binoculars? On the hunt for the perfect optical accessories for the bird watcher in your life? Advice from eHow experts make shopping for optics easy. Having trouble getting a good look at Mars on a perfectly clear night? Learn how to focus a telescope. From sighting wild game to locating a paramecium on a microscope slide, see it all with step-by-step instructions from resident experts.
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An equatorial mount facilitates better viewing of objects both in the sky and on land. It facilitates the moving of a telescope on two perpendicular axes of motion called the Right Ascension (RA)...
The Sky-Watcher SK804TAEQ Tabletop Telescope has two types of setting circles—RA (Right Ascension) and DEC (Declination). These are used for locating faint objects in the night sky with the help...
The Sky-Watcher SK804TAEQ Tabletop Telescope is one of the most portable telescopes. Its diameter is 80mm and its focal length is 400mm. Here is how to attach the tripod of the Sky-Watcher...
A finderscope is a small, secondary telescope mounted on the main telescope. It helps direct the telescope on the point of the desired object to be observed in the sky. A finderscope, also known...
A mount is the most vital component of a telescope. It assists in tracking the motion of moving stars or other moving objects in the sky. To attain maximum results, the telescope main tube has to...
Right Ascension (RA) is one of the sky coordinates. It is similar to the longitude of Earth. To find objects that are faint and difficult to trace, we have to use setting circles. This helps...
An eyepiece is the final lens attached to the telescope. The eyepiece collects light and brings it in focal point, which helps create an image. It is named so because it is closest to the eye when...
The Declination (DEC) flexible control cable is located at the fork arms of the telescope. Declination is a sky coordinate that is similar to the latitude of Earth. It is measured in degrees....
In astronomy, sky coordinates are similar to longitude and latitude on Earth. Sky coordinates are called right ascension (hour angle) and declination. To find objects that are too faint, one has...
A counterweight is an important part of a telescope. It locks the telescope into the mount for proper transport and balancing. To install a counterweight, the counterweight rod must first be...
The mount is an important part of any operational telescope. The mount helps track the movement of the stars or any moving body in the sky. Two types of mounts are widely used—altitude-azimuth (or...
Declination (DEC) is similar to the latitude of Earth. It is measured in degrees. Subdivisions for DEC are measured in minutes and seconds of arc. One minute of arc is 60 seconds, and 60 minutes...
An eyepiece is a lens attached to the telescope that is closest to the eye when looking through the device. The eyepiece gathers light and brings it into focus, which helps create an image. It...
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