Teleskop AC 102/1000 EvoStar BD EQ3-2

Describes the exact structure of the telescope thereby further subdividing the different types of telescope.

An achromatic is a refracting telescope (refractor), which consists of two lenses. It is the classic refractor design.

This is the distance between the objective lens or mirror and the focal point.

The ability of the optic to discern the fine detail of objects that are close together.

Light-gathering capacity of the telescope compared to the eye.

Most telescopes are made of steel, aluminium or carbon fibre.

The weight of the tube is critical for the correct choice of mount.

Focusers are available in 1.25" or 2" formats. Many 2" focusers also have a 1.25" adapter.

Object positioning system, available in real GoTo and also PushTo versions.

A telescope always displays an object upside down. This law of optics can only be compensated for by an erecting system. Erecting lenses, diagonal mirrors or Amici prisms provide you with an upright image. Diagonal mirrors provide an upright but back-to-front image and Amici prisms provide an upright and right-sided image.

Eyepieces are needed for observing. Depending on the focal length, you achieve a certain level of magnification.
The specification 1.25" refers to the diameter of the connector (1.25" = 31.8 millimetres).

Telescopes for experienced observers, but also for ambitious beginners.