Observation of the night sky in the city, especially in the metropolis, can not give pleasure to the true lovers of astronomy: sudden changes in temperature, smog and the night lighting of streets and buildings lead to instability and distortion produced in the telescope image. Therefore, many people prefer to indulge his hobby outside the city, in nature.
But not everyone has a dacha where it would be possible to keep the necessary equipment, or personal vehicle in order to get to the place of observation. And weight portable Amateur telescope complete with Equatorial mount considerable, and much of that weight falls on the mount (tripod and fixture for mounting and pointing of a telescope).