SkyWatcher 355/1650 DOB 14 GOTO telescope (SKU: SW-1323) Dobsonians opinie

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Sky-Watcher Synta N-355/1650 DOBSON 14" GOTO Telescope is a large Newtonian telescope on a collapsible Dobsonian mount with SynScan Go-To drive. The 355 mm aperture allows advanced visual observations of the Moon, planets, star clusters, nebulae and galaxies, while the Flex Tube collapsible design makes transport and storage of such a large instrument easier. The Go-To system enables automatic object finding and tracking, and control can be performed using the AZ SynScan hand controller or via the built-in Wi-Fi module and SynScan Pro app.

Key features

• large 355 mm aperture, suitable for demanding visual observations
• Newtonian optical system with a parabolic primary mirror
• 1650 mm focal length and f/4.6 focal ratio
• collapsible Flex Tube optical tube design, making transport and storage easier
• collapsible Dobsonian mount with SynScan Go-To drive
• automatic object finding and tracking in two axes
• database of 42900 objects, including Messier, NGC and IC catalogues
• control via the AZ SynScan hand controller or Wi-Fi with the SynScan Pro app
• dual-axis encoders, allowing the telescope to be moved manually without losing Go-To system orientation
• 2" Crayford focuser with 1.25" adapter
• 9x50 finderscope and two Super Plössl eyepieces included

SynScan Go-To system

The telescope is equipped with the SynScan Go-To system, which allows astronomical objects to be found automatically and kept in the eyepiece field of view. After the alignment procedure has been completed, the telescope can automatically point the optical tube at selected objects from the database. The system is especially useful during public sky shows, long observing sessions and observations of objects that are difficult to locate quickly by hand.

• control using the AZ SynScan hand controller
• control via the built-in Wi-Fi module and SynScan Pro app
• automatic pointing to objects from the database
• object tracking in two axes
• tracking modes: sidereal, lunar and solar
• alignment modes: brightest star and two-star alignment
• dual-encoder technology, allowing the optical tube to be moved manually without the need to realign the system

Flex Tube design

The Flex Tube collapsible design reduces the length of the optical tube for transport and storage. The tube does not need to be dismantled into separate sections - when collapsed, it remains one complete element, and after extending it is quickly ready for use. The mechanism has been designed to reduce the need for full collimation every time the telescope is extended, although with such a large Newtonian telescope, checking the optical alignment before observations remains recommended.

Due to its size and transport safety, the primary mirror is supplied in a separate box. The mirror is factory-mounted in its cell and prepared for installation in the optical tube.

Observing capabilities

A telescope with a 355 mm primary mirror gathers a very large amount of light and allows advanced visual observations. Under dark skies it performs especially well when observing deep-sky objects, such as nebulae, star clusters and galaxies. The large aperture also provides high angular resolution, useful for observing the Moon and planets, provided that atmospheric conditions allow it.

• Moon: numerous craters, mountain chains, shadows of surface formations and fine lunar surface details
• Mercury and Venus: planetary phases visible under suitable observing conditions
• Mars: planetary disc, polar caps and larger albedo features during favourable oppositions
• Jupiter: atmospheric belts, the Great Red Spot, Galilean moons and their shadows on the planetary disc
• Saturn: rings, Cassini Division, shadow of the rings on the planetary disc and the brightest moons
• Uranus and Neptune: small planetary discs, distinguishable from stellar images at higher magnifications
• comets and asteroids: Solar System objects that can be tracked over successive nights
• double and multiple stars: numerous systems available for visual observation
• deep-sky objects: open clusters, globular clusters, emission nebulae, planetary nebulae and galaxies, including objects from the Messier, NGC, IC and Caldwell catalogues

With its f/4.6 focal ratio, it is worth using high-quality eyepieces that work well with the steep light cone of a fast parabolic mirror. For wide-field observations and short-exposure astrophotography, a coma corrector may also be useful.

Applications

Moon

planets

star clusters

nebulae

aircraft

Kit contents

• Sky-Watcher Dobson 14" Flex Tube Go-To optical tube
• collapsible Dobsonian mount with SynScan Go-To system
• AZ SynScan hand controller
• 2" Crayford focuser with 1.25" adapter
• Super PL 25 mm eyepiece
• Super PL 10 mm eyepiece
• 9x50 finderscope
• car socket power cable

Technical specifications

• manufacturer: Sky-Watcher
• SKU: SW-1323
• optical system: Newtonian
• mount type: Dobsonian
• aperture: 355 mm
• focal length: 1650 mm
• focal ratio: f/4.6
• primary mirror: parabolic
• primary mirror material: Pyrex
• mirror coatings: aluminium with protective coating
• secondary mirror diameter: 93 mm
• limiting stellar magnitude: 15.4 mag
• maximum useful magnification: 710x
• maximum resolving power Rayleigh: 0.40"
• maximum resolving power Dawes: 0.33"
• light gathering power: 2572x
• tube length: 1510 mm
• optical tube weight: 24 kg
• mount weight: 38 kg
• total weight: 62 kg
• tripod type: Dobsonian
• tripod height: 830 mm
• mount control: SynScan Go-To, AZ SynScan hand controller, Wi-Fi with SynScan Pro app
• focuser type: Crayford
• focuser diameter: 2"
• focuser adapter: 1.25"
• focuser fine adjustment: no
• finderscope: 9x50
• eyepieces included: Super PL 25 mm, Super PL 10 mm
• electronics warranty: 24 months
• warranty period: 60 months

Go-To system specifications

• power supply: 10-15 V DC, 1 A
• power plug: 2.1 mm, centre-positive
• drive: DC servomotors
• motor encoder resolution: 1620000 counts per revolution
• axis encoder resolution: 11748 counts per revolution
• slewing speeds: 1x, 2x, 8x, 16x, 32x, 200x, 400x, 600x, 800x, 1000x
• tracking modes: sidereal, lunar, solar
• tracking method: alt-azimuth, in two axes
• alignment modes: brightest star, two-star alignment
• object database: 25 user-defined objects, Messier catalogue, NGC catalogue, IC catalogue, part of the SAO catalogue, 42900 objects in total
• pointing accuracy: up to 5 arcminutes

Additional information

• mains power supply is not included
• due to the portable nature of the set, suitable battery power can be used for field operation
• when observing the Sun, only a full-aperture solar filter designed for this telescope and a light shroud for the Flex Tube optical tube must be used
• never point the telescope at the Sun without a correctly mounted, safe solar filter

The Sky-Watcher Synta N-355/1650 DOBSON 14" GOTO combines the large aperture of a Dobsonian telescope with the convenience of automatic object finding and tracking, making it well suited both for individual visual observations and public sky shows.