Tejraj Logo
 
STARTRACKER EXPLORE SCIENTIFIC G.S.O. Taiwan i-Optron GoTo Systems BRESSER Germany SKY-WATCHER Telescopes with
Motor & GoTo
SPOTTING SCOPES BINOCULARS EQUATORIAL MOUNTS EYEPIECES & ACCESSORIES CAMERA ADAPTORS OPTICS / KITS FILTERS
 
Explore Scientific Telescopes
YOU ARE HERE >> HOME | EXPLORE SCIENTIFIC | ES 12" Truss Dob Telescope

EXPLORE SCIENTIFIC 12" Dobsonian - [ IMPORTED ON ORDER ]
D=305 / F=1525mm 2nd Generation Truss Tube 'Ultra Light' Dobsonian Telescope
93000 + 18% GST
[ click to enlarge ]
[ click to enlarge ]
[ click to enlarge ]
[ click to enlarge ]
[ click to enlarge ]
[ click to enlarge ]
 
[ click to enlarge ]
 


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
  • Counter-weights 2 x 1.0 kg
  • Extension tube for focuser
  • Reducer 2"/1.25"
  • Manual
  •  
    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: Counter-weight system included - 2 x 1.0 kg 
  • 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
  •  
    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
    Eyepiece 1.25"
    Your choice of any two GSO Premium Plossl Eyepiece 1.25''

    any one from series:: 12mm / 9mm / 6mm / 4mm
    any one from series:: 15mm / 20mm / 25mm / 32mm
    [Subject to Stock Availability in choices]
    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
    Buy BAADER Solar Safety Film
    Buy 1000 OAKS Solarite Safety Film
     
    Instructions for use in ENGLISH
    Download Instruction Manual for EXPLORE SCIENTIFIC 12" Truss Dobsonian in .PDF format
     
    The following items are FREE with the telescope listed above.
     
    Suggested Accessories with this Telescope
      SOLAR FILTER
    • Baader Solar Filter (off-axis) Germany . . . . Rs. 2100
    • R-G Solar filter (USA) provide more pleasing and natural Yellow-Orange image of the Sun . . . . Rs 2460
      EYEPIECES (Super Premium Plossl for GSO)
    • 40mm Plossl Eyepiece 1.25" . . . . Rs. 2820
    • 32 mm Plossl Eyepiece 1.25" . . . . Rs 2640
    • 25 mm Plossl Eyepiece 1.25" . . . . Rs. 2550
    • 20 mm Plossl Eyepiece 1.25" . . . . Rs. 2460
    • 15 mm Plossl Eyepiece 1.25" . . . . Rs. 2280
    • 12 mm Plossl Eyepiece 1.25" . . . . Rs. 2100
    • 6 mm Plossl Eyepiece 1.25" . . . . Rs. 2100
    • 4 mm Plossl Eyepiece 1.25" . . . . Rs. 2100
    • GSO SuperView 15mm 1.25" Wide Angle Eyepiece . . . . Rs. 3000
    • GSO SuperView 20mm 1.15" Wide Angle Eyepiece . . . . Rs. 3000
    • GSO SuperView 30mm 2 " Wide Angle Eyepiece . . . . Rs. 4800
    • GSO SuperView 42mm 2" Wide Angle Eyepiece . . . . Rs. 4800
    • GSO SuperView 50mm 2" Wide Angle Eyepiece . . . . Rs. 4800
      BARLOW
    • GSO 2x ED-Barlow-Lens (Multicoated) . . . . Rs.4800
    • GSO 2X Achromatic BARLOW LENS- fully multicoated 1.25" . . . . Rs. 1470
    • ED 3X Barlow Lens GSO 1.25" . . . . Rs. 2640
    • 3 Elememt 2.5x Barlow GSO 1.25"  . . . . Rs. 2370
    • 3 Elememt 5x Barlow GSO . . . . Rs. 2820
      CAMERA ATTACHMENTS
    • T-RING Nikon . . . . Rs. 840
    • T-RING Canon . . . . Rs 840
    • T Adapter 1.25" . . . . Rs. 750
    • Universal A-focal / Digital camera adapter . . . . Rs 930
    • Universal A-focal / Par-focal cam-cord adapter . . . . Rs 1200
    • Super ACHROMATIC (MultiCoated /High Colour corrected) 2X BARLOW 1.25" OD, 2 ELEMENT LENS with T-thread for direct camera attachment /with Brass compression ring / GSO. . . . Rs. 3,000
    • 2 inch T-2 Camera Adapter . . . . Rs 1650
    • Eyepiece Projection Camera Adapter . . . . Rs. 2100
    • Universal Cell Phone Adapter . . . . Rs. 1830
    • GSO 1.25" 32mm Camera Projection Lens (CPL) eyepiece ... Rs. 3,900
    • GSO 1.25" 40mm Camera Projection Lens (CPL) eyepiece ... Rs.4,080
    • GSO 2" 30mm Camera Projection Lens (CSV) eyepiece ... Rs.5,700
    • GSO 2" 42mm Camera Projection Lens (CSV) eyepiece ... Rs.5,700

    • CARRY BAG
    • Carry Bag for 10 inch Dobsonian TRUSS . . . . Rs. xxxx
    • GSO....0.5X Focal Reducer 1.25" with 25mm extension tube ....Rs 1560
    • GSO.....0.5x Focal Reducer 2 inch ....Rs 2100
    • GSO Planet View Filters each . . . . Rs 660
     
     
     
    TEJRAJ & CO. ASTRONOMICAL TELESCOPES BINOCULARS OTHER ACCESSORIES
    Our Awards
     
     
     

    Copyright © 2008 - Tejraj & Co. All Rights Reserved.