Binoculars are useful as a tool for astronomical observation. You can use it to watch a ball game, concert or birds in the sky. You can also use it to enjoy two million light years away from the Milky Way, the moon's craters, several satellites around Jupiter, galaxies and nebulae. Many people are mistaken in binoculars is not as astronomical observation. In fact, it is a lot of experienced astronomers favorite tools. There are six telescope performance parameters, which are caliber, magnification, field of view, relative aperture, limiting magnitude and resolution skills.