Teleskop AC 102/500 StarTravel BD AZ-3

The aperture indicates the diameter of the objective lens or the mirror.

Is the ratio of the aperture to the focal length of a telescope.

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.

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.

A mini telescope used to locate a celestial object. There are optical finders and red dot finders.

A red LED dot is projected onto a disc.

Telescopes for experienced observers, but also for ambitious beginners.