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EXPLORE SCIENTIFIC Ultra Light Dobson 500mm f/3.6 GENERATION II
[0116950]

Prijs: 6.999,00 EUR

 

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Product Details

Ultra Light Dobsonian 406mm GENERATION II - telescope mechanics handcrafted in HUNGARY and GERMANY

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 (part No. 0510330). The ideal workhorse for the deep-sky enthusiast. A telescope with 500mm aperture gathers more than 5100-times more light than the naked eye. Details on planetary surfaces stand out even to unexperienced observers, and countless deep-sky objects show details and some color. Bright globular clusters are resolved down to the core and the view of the lunar terminator will provide a unforgettable experience. 

The fast 20 "f3.6 main mirror as well as the large 120mm secondary mirror are made of high quality quartz material, so the cooling time is reduced to a minimum and the Dobson is quickly ready for use. Every main mirror is delivered with an individual optical test certificate, which guarantees the highest capacity. A laser engraved center mark of the main mirror allows easy adjustment. The optical surface has a high-quality aluminum silvering with 94% reflectivity and an extremely resistant quartz protection layer. The mirror overcomes frequently occurring dew fogging and cleanups without any damages and guarantees a long service life. 

A complete redesign of this Dobson was necessary to ensure the significantly increased requirements to stiffness and load bearing capacity of the optical components. All connections of the tube structure were made in the TIG welding process and no rivets and screws were used. This has made it possible for us to produce this 20 "light weight Dobson so unbelievably stiff in spite of the low weight - a noticeably good quality which is searching for its match. The production of almost all mechanical components is carried out by our partners in Hungary and the final assembly of the optics and subsequent quality control takes place in Rhede, Germany. 
Product Specificaties

Field of application
  • Deep Sky Observation
  • Planetary observation
Focus group
Focus Group
  • Advanced Amateurs
  • Specialists and Research
  • Visual enthusiasts
Product family
Product Family Reflector telescope
OPTICAL SPECIFICATIONS
Optical design Newtonian Reflector
Magnification from 40
Maximum recommended magnification 1000
Material Primary mirror Quartz
Primary mirror diameter 500 mm
Material Secondary mirror Quartz
Secondary mirror diameter 120 mm
Focal length 1800 mm
Aperture ratio 3.6
Angular resolution 0.28 arc seconds
Finderscope 8 x 50 mm - illuminated
Mount Type Dobson
ELECTRONICS, HARDWARE & SOFTWARE
Batteries needed2 2x LR41, 1.5V
Batteries included
GENERAL TECHNICAL DATA
Material OTA Aluminium
Bearing in alt-azimuth / RA Teflon
Bearing in elevation / DEC Teflon
Focusing system 2.5" Hexafoc DeLuxe with 10:1
Colour black
Standard warranty 2
Ext. warranty after online registration 5 Years
DIMENSIONS & WEIGHTS
Total length 68 cm
Total width 68 cm
Total height 179 cm
Net Weight total (incl. accessories) 53 kg
Eyepiece Barrel Diameter 50.8 mm
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