A medium-sized Newtonian system telescope with moderate aperture, well suited for planetary observations as well as for observing nebular objects. Hassle-free to use, stable, producing sharp and clear images with minimal coma, it is a great solution for beginning astronomy enthusiasts.Optical System
. This is a telescope with a relatively long focal length and moderate focal length. In this case luminosity is f/8 which virtually eliminates the basic drawback of Newtonian telescopes, which is coma. The images given at a moderately large aperture (15cm) are calm, this telescope is less sensitive to bad seeing than 20-40cm telescopes..
Mounting
. The telescope is suspended on an azimuthal Dobson mount, which allows easy rotation in azimuth and elevation. The telescope is mounted on two sides in a forked mount, while the entire top of the mount rotates at the base. With a very low center of gravity and made of fairly rigid materials, the telescope is suspended in a much more stable manner than parallactic mounts.Extractor
. The telescope is equipped with a 2' eyepiece extractor with a reduction to 1.25'. It is a Rack&Pinion type focuser, i.e. a classic focuser built around a rack and pinion.Technical data
. Telescope optical system: Newtonian
Mount type: Dobson
Max theoretical magnification: 225x
Stellar range: 13.5 mag
Luminosity: 8
Eyepiece focuser: rack&pinion
Extractor diameter: 2 inches with reduction to 1.25 inches
Finder: optical 6 × 30
Eyepiece focal lengths/magnification: 25 mm/48x, 10 mm/120x
Maximum resolving power: 1 inch
Secondary mirror diameter: 45 mm
Lens diameters: 150 mm
Objective focal length: 1200 mm
Collective capacity: 459x
Tube length: 1140 mm
Tripod height: 740 mm
Mount control: manual
Tube weight: 6 kg
Mount weight: 12 kg
Weight: 18 kg
Manufacturer: Sky-Watcher, Taiwan
