Astronomy Binoculars is another great choice for apprentice astronomers. A good pair of Bushnell binoculars would be cheaper than a high quality telescope or a spotting scope and would offer greater portability. Of course, discovering distant galaxies or watching planets up close would be impossible with a pair of binoculars by Leupold or Nikon since binoculars simply don’t have enough magnification. But if a star cluster or nebulae is all you want to see, Zeiss binoculars, for example, could be even more effective than a telescope.
Few things matter when picking a good binocular for astronomy. First, pay attention to the aperture – it’s the most important specification in any astronomy binocular. Aperture is the diameter of a front lens, and the larger it is, the brighter the image will be. Objective size is the second number in binocular specifications. Binoculars with front lenses larger than 60mm are called giant binoculars. For a binocular that big you may want to purchase a tripod.
Magnification is the first number, describing a binocular. For astronomy binoculars you should go with at least 7x magnification. But in order to get a clear, steady image with a hand-held astronomy binocular, you would not want to go higher than 10x. Astronomical binoculars with magnification higher than 10, require a tripod but will provide awesome stargazing experience.
Exit pupil is another important factor. It is calculated by dividing the aperture by the magnification. For example, a 10x50 binocular has an exit pupil of 5mm. Any binocular with an exit pupil of more than 5 can be used for astronomy.