The Mensa 90/1000 EQ5 is a long-focus refractor with a 90mm aperture on a time-driven mount. It can operate at magnifications of 50x, 111x, 150x, 250x or more: the formal magnification of the instrument with the glasses and Barlow lens provided even exceeds the limit useful for telescopes of this design.
The telescope's twolensed, multi-lensed objective is achromatic. Set glasses are three-lens as well as achromatic. The angular field of view of each of the glasses is at least 40°, with the long-focus one even closer to 50°.
The EQ 5th Generation Equatorial mount realises accurate aiming of the telescope at astronomical objects moving relative to the earth's surface. The EQ5 mount has a generous payload and is designed to accommodate a 150 mm telescope tube.
The SIGETA Mensa telescope is well suited to begin serious astronomy studies and can also be used as a powerful telescope. Its 20 mm eyepiece is excellent for ground-based observation at 50x magnification, and its diagonal direct-vision prism provides a straight, unconverted image.
Mensa's astronomical abilities are even more significant: you can make planetary observations, view bright galaxies and star clusters and study the geography of the visible side of the moon. The telescope's focuser has a T-ring thread, which means a camera can be attached to it.