Manufacturer: Explore Scientific
Product number: 0116930

EUR 1.249,00


incl. 19 % VAT (DE)  
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  • On stock
  • Only 1 pcs left in stock





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  • Details..
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Explore Scientific Ultra Light Dobsonian - aperture 305 mm - Generation II
Modern 305mm truss-dobsonian telescope in full aluminium construction
Modern secondary mechanics - the collimation is easily achieved without tools and keeps collimation well during transports
Modern primary mirror cell - the telescope mirror can be collimated from the front while looking through the eyepiece and is supported by a modern floatation system with radial roller bearings
Large powder coated altitude wheels provide smooth and precise movement even at high magnifications
Secondary unit and altitude wheels fit into the rocker box and the mirror box includes a cover for transport so that the whole telescope breaks down into only two aluminium cases and the trusses
Extremely high rigidity construction
Dew-resistant because of aluminium construction: no deforming press board due to the exclusive use of metals
Lightweight: the aluminium profile/aluminium plate construction reduces the weight to about half of the mass of most press board designs of this price range
Two large radial fans for fast thermal equilibrium



Ultra Light Dobsonian Generation II
with completely redesigned and improved construction

No telescope type has influenced amateur astronomy as radically as the dobsonian telescope. Before the introduction of this telescope type by John Dobson the vast majority of amateur telescopes were small inadequate refractors on shaky mounts - just good enough to show the polar regions on mars or the rings of Saturn. Bigger telescopes, like the Schmidt-Cassegrain telescopes, were restricted to the relatively small group of amateurs that could afford them. The brilliant combination of simple - but effective - mechanics and the largest aperture available led to a worldwide triumph of this concept. No other telescope type offers you so much light for your money as a good Dobsonian.

Explore Scientific has taken the motto "held together by gravity and driven by yoghurt power" and offers a modern version of the classic - designed by amateur astronomers for amateur astronomers. Despite its large aperture the telescope can be transported easily even in small cars and is assembled within minutes without tools. The construction was optimized for maximum rigidity with a minimum of mass. The combination of big altitude wheels and a optimized aluminium sandwich construction allows for small movements even at high magnifications. The focus position is already positioned to accept the coma corrector made by Explore Scientific.

The ideal workhorse for the deep-sky enthusiast: a telescope with 305 mm aperture gathers more than 1800-times more light than the naked eye. Details on planetary surfaces stand out even to unexperienced observers, and countless deep-sky objects show details. Bright globular clusters are resolved down to the core and the view of the lunar terminator will provide a unforgettable experience.
Optical design:Newtonian Reflector
Aperture:305 mm (12")
Focal length:1525 mm
Focal ratio:f/5
Secondary mirror diameter:75 mm
Obstruction:25%
Angular resolution:0.43 arc seconds
Material OTA:Aluminium
Focusing system:2" Rack-and-Pinion Focuser with helical gearing and 10
Adapter to 1.25":Included
Finderscope:DeLuxe Red Dot Finder
Dust protection caps:Dust protection caps for open aperture and eyepiece holder
Mount type:Dobsonian
Eyepiece height while pointing at zenith:approx. 1.4 m
Dimensions rocker box:450 mm x 450 mm x 320 mm
Dimensions mirror box:380 mm x 380 mm x 300 mm
Dimensions truss length:approx. 980 mm
Weight mirror box:18.9 kg
Weight secondary cage + rocker box:10 kg
Weight 4 pairs of trusses:1.8 kg
Weight altitude wheels:1.4 kg
Total weight:only 32.1 kg
Truss Dobsonian Telescope
LED finder with standard finder slot
Stray light shield for secondary cage
Main mirror collimation tool
Battery compartment with bag for fans
Extension tube for focuser
Reducer 2"/1.25"
Manual



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Reviews

Written by Marius Kohsiek
on 2023-08-09

"Dieser Gitterrohr-Dobson ist zweckmäßig und durchdacht konstruiert. Das Teleskop ist für seine Größe nicht zu schwer sowie kompakt zerlegbar und passt dann in den Kofferaum eines Kleinwagen. Installation und Kollimation (z.b. mit einem Laserwerkzeug) sollten für mindestens durchschnittlich handwerklich begabte Personen zügig machbar sein. Mit etwas Übung ist der Aufbau auch alleine machbar. Die optische Qualität überzeugt mich (Bin Anfänger bzw Wiedereinsteiger) Anregungen/mögliche Verbesserungspunkte: Anbringung der Aufnahmen für die Stangen außen an der Spiegelkiste damit der Deckel im aufgebauten Zustand geschlossen werden kann, um den Staubeinfall zu reduzieren, sollte z.B. das Gerät mehrere Nächte in Folge verwendet werden oder permanent aufgebaut werden. Alternativ etwas haltbarere Abdeckungen für Haupt- und Sekundärspiegel (Lassen sich aus dem gegebenen Material improvisieren) oder halt eine Verkleidung für den Gitterrohr-Tubus beschaffen. Eine Innenbeleuchtung für die Spiegelkiste mit roten LEDs für die Justage/Kollimation in Dunkelheit (Lässt sich aber auch sehr leicht selbst basteln). Fazit/Gesamteindruck: Ein tolles Scope für einen guten Preis!"

Written by Robert Weizenmüller
on 2023-06-23

"Daumen nach oben für dieses Teil"

Written by Matthias Schutera
on 2017-06-06

"Teleskop kam gut verpackt bei mir an. Aufbau ist problemlos und nach einiger Übung in wenigen Minuten erledigt. Wichtig ist allerdings, die Kollimation nach dem Aufbau zu prüfen, da man hier sonst nicht die komplette Leistung des Teleskops nutzen kann."