Altazimuth mounting

An Altazimuth or alt-azimuth mount is a simple mount used for moving a telescope, camera, helostatic mirror, or solar panel along two perpendicular axes of motion, one vertical and one horizontal. The vertical movement is known as the altitude, while the horizontal motion is called the azimuth.The biggest advantage of alt-azimuth mounts is their simplicity in both manufacture and use. They are often used for beginner telescopes, or for spotting scopes, but are still widely in use for more advanced instruments. In the latter case, advanced electronics and motors are sometimes attached to compensate for the restrictions of the mount's simplicity.
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A method of mounting a telescope using two rotation axes, one of which is parallel to the horizon, the other of which is perpendicular. This is the simplest movable mounting for a telescope. To track stars, as they appear to move across the celestial sphere, because of the rotation of the Earth, altazimuth mountings must be driven about both axes. Equatorial mountings are a better design since they only need to be driven about one axis. However, these are more expensive to build and so altazimuth mountings still find a place in professional astronomy. See also altitude, azimuth.

MONTATURA ALTAZIMUTALE