Ultra Light Dobsonian 305mm 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 dobson. We have taken the motto "held together by gravity and driven by yoghurt power" and offer 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 our coma-corrector. The ideal workhorse for the deep-sky enthusiast.

A telescope with 305mm 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.
 
SCOPE OF DELIVERY

• 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
• CW - Custom Made On Order (Optional - Buy Separately)

 
FEATURES
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
 
SPECIFICATION

• Truss-Dobsonian Telescope in full Aluminium construction
• NEW: Slider bearings made from TEFLON und GFK for smooth and precise movement
• NEW: Improved main mirror cell with completely redesigned mechanics
• NEW: Altitude bearings with new designed brake and friction system
• NEW: Larger feet to improve stability
• NEW: Universal finder slot to enable an easy finder upgrade 
• NEW: Quick-lock fasteners with new springloaded design for comfortable use
• NEW: Powder-coated yellow altitude wheels to improve durability
• NEW: Laser engraved central mark on main mirror

TELESCOPE SPECIFICATION

FIELD OF APPLICATION
Field of application	Deep Sky Observation Lunar observation Planetary observation
FOCUS GROUP
Focus Group	Visual enthusiasts Advanced Amateurs Specialists and Research
TELESCOPE SPECIFICATION
Optical design	Newtonian Reflector
Maximum recommended magnification	600
Material Primary mirror	BK-7
Primary mirror diam.	305 mm
Secondary mirror diameter	75 mm
Mirror/Lens diam.	305 mm
Focal length	1525 mm
Aperture ratio	5
Obstruction (%)	24
Angular resolution	0.43 arc seconds
Finderscope	DeLuxe Red Dot Finder
Mount Type	Dobsonian
Focuser thread	M54 x 0.75 mm
GENERAL TECHNICAL DATA
Material OTA	Aluminium
Transportability	very good
Focusing system	2" Rack-and-Pinion Focuser with helical gearing and 10:1 reduction
Colour	black
Dust protection caps	Dust protection caps for open aperture and eyepiece holder
DIMENSIONS AND WEIGHT
Rockerbox	450mmx450mmx320mm
Mirrorbox	380mmx380mmx300mm
Trusses approx	980mm
Eyepiece Height while pointing at zenith approx	1.4m
Net Weight total (incl. accessories)	29.8 kg
Eyepiece Barrel Diameter	50.8 mm
12“ Net total weight	32.1kg
12“ Mirror Box	18.9 kg
12“ Secondary cage + Rockerbox	10 kg
12“ 4 Pairs of trusses	1.8kg
12“ Altitude Wheels	1,4kg

WARNING

This device focuses a lot of light.
Looking directly at the SUN through this device can result in partial or complete loss of vision.
For observing the SUN, we recommend you buy a 'Solar Safety Film' for this Telescope.

Buy 1000 OAKS Solarite Safety Film

Instructions for use in ENGLISH

Download Instruction Manual for EXPLORE SCIENTIFIC 12" Truss Dobsonian in .PDF format

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