Sonnenteleskop ST 90/800 SolarMax II BF15 <0,7A OTA

Specifies the width of the area through which light of certain wavelengths is allowed to pass. Light is blocked outside of this range.

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

With H-alpha telescopes you can observe prominences, flares and filaments on the Sun. Additionally, these telescopes have an etalon filter and a blocking filter.

Caution: you can also buy versions without the blocking filter. You should never use these without a blocking filter.

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.

The deflection optics with the eyepiece receiver also accommodate the blocking filter.

There are basically two different construction types: the rack and pinion focuser and the Crayford focuser.

Describes the exact construction of the particular mount and thereby further subdivides the different types of mount.

An OTA is an optical tube without a mount. It is short for optical tube assembly.

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).

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

Extends the focal length and thus increases the magnification of a telescope. It is positioned between the telescope and eyepiece or camera.

These inexpensive solar telescopes already have all the advanced techniques of Coronado.

Telescopes for safe solar observing.

Telescopes that are supplied as a complete system and are easy to operate.

Telescopes for experienced observers, but also for ambitious beginners.