Skywatcher Evostar-90 on AZ3 Mount

Skywatcher 90/900 optics:

This optics is equipped with an achromatic objective. Because of a special combination of two lenses within the objective, most of the colour aberrations can be corrected. Thus, you do not have to face so many disturbing irregularities as usual with common Fraunhofer refractors. The focal ratio of f/10 has an additional positive effect.

A 6x30 finder scope, two eyepieces and a star diagonal are included in delivery as accessories.

The advantages at a glance:

almost no chromatic aberration

easy to use

compact tube, transportable

little sensitivity to turbulences in the tube

almost not sensitive to misalignment

well suitable for solar observations if used with objective filter or Herschel wedge

Skywatcher AZ3 mount:

The Skywatcher AZ-3 is a practical alt-azimuth mount, easy-to-use and providing good stability.

It can serve as a base for terrestrial or astronomical observing and support telescopes or spotting scopes up to a maximum weight of 5 kg (refractors of up to 120 mm aperture and reflectors of up to 150 mm diameter).

The AZ-3 has horizontal quick adjustment plus a locking screw, and vertical quick adjustment with a slipper clutch. There is fine adjustment with flexible slow motions available on both axes. The tracking is absolutely smooth and sensitive adjustment and allows fine adjustment even at high magnification.

The vertical angle can be adjusted between 50 and 90 degrees, allowing viewing from the horizon up to nearly the zenith and panning 360°. The AZ-3 mount is hence equally suited for terrestrial and astronomical observing.

Technical data:

alt-azimuth mount allowing 360° panning and adjustable from the horizon to almost the zenith

vertical rapid adjustment with slipper clutch

fine adjustment via flexible slow motions

aluminium tripod - infinitely adjustable from 70 cm to 123 cm

Manual:

Teleskop-Service has collected a lot of helpful information on refractors and made it available as a PDF: refractors.pdf