Introduction To Binoculars

Picked up some cool facts on Binoculars -

• Unlike a (monocular) telescope, binoculars give users a three-dimensional image.
• A basic telescope has two magnifying glasses placed in line at a fixed distance. The front glass is the objective lens and the one near the eye is the eyepiece. As telescopes invert images, binoculars require a third element – an erecting prism to flip the image for us to enjoy a naturally magnified view of objects.
• In a binocular 7x50 or 10x50, the first number  “7” or “10” is the magnification. Binocular comes with magnifications from 7x to 20x.
• The last number “50” is the aperture in millimeters. Larger the number, the brighter the images will appear. 
• Recommended size: 8x36 or 8x40 for good quality birding binoculars.
• Binoculars are widely used by amateur astronomers; their wide field of view making them useful for comet and supernova seeking (giant binoculars) and general observation (portable binoculars).
• Ceres, Neptune, Pallas, Titan, and the Galilean moons of Jupiter are invisible to the naked eye but can readily be seen with binoculars. Although visible unaided in pollution-free skies, Uranus and Vesta require binoculars for easy detection.

Read More:

http://www.kolkatabirds.com/binocs.htm

http://en.wikipedia.org/wiki/Binoculars

http://www.tejraj.com/binoculars.html
http://www.tweet.com/konfuciy.asp?tda=dt&t=7697&fs=binoculars