The principle of the telescope is not increasing, and in the gathering light. The larger the size of the main light-harvesting element, a lens or mirror of a telescope, the more light it will get. It is important that the total amount collected by the telescope the light ultimately determines the level of detail visible - whether it is a remote landscape or the rings of Saturn. Although the magnification, or power for a telescope is also important, it is not critical in achieving the level of detail. The telescope focuses the light rays and creates an image collecting caught the rays in one point.

On the way to work with light optical telescopes can be divided into a lens, and mirror combination mirror-lens telescopes.

When choosing a telescope is important to know the diameter of the lens, resolution, zoom and quality construction and components.

The amount of light collected by the telescope depends on the diameter of the main mirror or lens. The amount of light passing through the lens, in proportion to its area. But the diameter for the lens specifications important the value of the relative aperture is equal to the ratio of diameter to focal length - it is also called the aperture. The relative focus is called the reciprocal value of the relative hole. Resolution is the ability of the display parts, i.e., the higher the resolution, the better the image. A telescope with high resolution can separate two remote ones of the object, while a telescope with low resolution will be visible to only one of the two mixed, object. Stars are point sources of light, so they are difficult to observe and the telescope can only see a diffraction image of the star in the form of a disc with a ring of light around it. Officially the limit of visual resolution of a telescope is called the minimum angular interval between a pair of equal brightness stars when they are still visible with sufficient magnification and the lack of interference from the atmosphere separately. This value for good tools is approximately equal to 120/D arc seconds, where D is the telescope aperture (diameter) in mm. Magnification of the telescope must lie in the range of D/7 to 1.5 D, where D is the aperture diameter of the telescope lens. That is for pipe with 100 mm diameter eyepieces must be chosen so that they provide magnifications from 15x to 150X.

The mount of the telescope is part telescope, which enhanced the optical tube. It allows you to point the telescope to the observed region of the sky, ensures the stability of its installation in the working position, ease of implementation observations. The mount consists of a base or column, of two mutually perpendicular axes for rotations of a telescope, drive and frame of reference rotation angles.

"RONBO.RU" Moscow
2007