Sky-Watcher EXPLORER-250PDS (254/1200mm, f/4.7) OTA


Manufacturer: Sky-Watcher


Product.Nr.: OV#10221

Manufacturer: Sky-Watcher

739,00 EUR
incl. 19 % VAT

  • Gewöhnlich versandfertig in 24 Stunden Gewöhnlich versandfertig in 24 Stunden
  • delivery time : 1-2 Tage
  • weight 20,2 kg

products condition NewCondition


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product description

  • Newtonian Reflector
  • 254/1200mm, f/4.7
  • 1:10 Dual-Speed Crayford focuser
  • 2" + 1.25" Adapter
  • Dovetail Bar (Vixen System)
  • incl. Findersope, 2" Eyepiece...

 

OPTIMISED FOR PRIME FOCUS ASTRO-PHOTOGRAPHY

The new Sky-Watcher EXPLORER-250PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-250P Black Diamond Series, but with two significant advantages. A Dual-Speed 10:1 ratio focuser is now included for excellent focusing precision. Also the tube length has been slightly shortened to optimise performance for prime-focus photography. Even better performance for astro-photography and visual use can be achieved when used in combination with Sky-Watcher’s Newtonian coma corrector (Prod.Code OV#20233).

PARABOLIC PRIMARY MIRRORS
Features High Quality Parabolic Primary Mirrors to eliminate spherical aberrations inherent in 'fast' focal lengh reflectors with spherical primary mirrors. The mirrors are parabolized to bring all the light rays to the same focal point to give sharp, constrasty images, which are full of detail.

SKY-WATCHER DELUXE MIRROR COATINGS
Most reflectors today usually have a coat of aluminium as the mirror surface and then an overcoat of silicon monoxide or silicon dioxide to protect it. Silicon dioxide produces a much more durable coat than silicon monoxide but requires specialized equipment to apply it and is therefore more expensive. Protection is needed, because in most reflectors, the mirror is open to the elements and deterioration of the reflective layer reduces the resolution of the telescope. ALL Sky-Watcher reflectors are Multi-Coated with Silicon Dioxide as standard for Optimum Durability and Long Term Performance.

 

Standard Specification

  • Magnification (with eyepiece supplied) x43
  • Highest Practical Power (Potential) x508
  • Diameter of Primary Mirror 254mm
  • Telescope Focal Length 1200mm (f/4.7)
  • Eyepiece Supplied 25mm (2"/50.8mm)
  • 9x50 Finderscope
  • Parabolic Primary Mirror
  • 2" (50.8mm) Dual-Speed 10:1 Crayford Focuser
  • 0.5mm Ultra-Thin Secondary Mirror Supports
  • Complete with tube rings and dovetail bar
  • 56% more Light-Gathering than 200mm

 

Scope of Delivery

  • Sky-Watcher EXPLORER-250PDS OTA
  • Finderscope 9x50mm
  • 2" Crayford focuser, 1:10 Dual-Speed, 2"/1.25" Adapter
  • 2" Eyepiece 28mm LET
  • Tube rings + Dovetail Bar (Vixen System)

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