The Observatory's telescope uses liquid metal reflecting surface, which can be seen here.

These telescopes use filtration and projection techniques for direct observation, in addition to various types of filtered cameras.

A theodolite was a high powered yet relatively compact telescope used for observing the heavens.

Most modern professional telescopes use a guide star.

Since reflecting telescopes use mirrors, the design is sometimes referred to as a "catoptric" telescope.

Some telescopes use primary mirrors which are made differently.

The observers can image through the telescopes using CCD cameras.

The telescope used a 132 cm mirror and 102 cm correcting plate.

For this purpose uses the department the biggest telescope in Czech Republic - reflector with a 2m wide mirror.

Cameras and telescopes use multiple lens elements and have different design criteria.