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Sky-Watcher 100/900 Evostar ED Doublet OTA

SKU: SWBDED100-OTA Categories: , , ,

The Sky Watcher 100mm Evostar ED Doublet Refractor is a razor sharp telescope, the ultimate upgrade from your beginner model.

  • ED Optics
    • ED stands for “extra-low dispersion,” which refers to the composition and optical properties of the glass used for the lenses.
    • ED glass is specially formulated and contains rare-earth compounds that greatly reduce a visual defect called chromatic aberration.
  • Metallic High-Transmission Lens Coatings (MHC)
    • Each air-to-glass lens surface has been coated by Sky-Watcher’s proprietary MHC. An anti-reflection metallic coatings which ensure optimum light-transmission approaching 99.5%.
  • Doublet Refractor
    • A doublet is a telescope which incorporates two lens for an improved optical performance.

 

Features:

  • Aperture: 3.9″ (100.0 mm)
  • Focal Length: 900 mm
  • Focal Ratio: F 9.0
  • Optical Design: ED Doublet Refractor
  • Eyepieces: (2x)
    • 20mm, 45X
    • 5mm, 180X
  • Mount Type: Not included, optical tube only
  • GoTo Feature: Not Applicable, mount / tripod required
  • Tripod material: Nil, optical tube Only
  • Focuser: Precision 2 inch Crayford
  • Warranty: 5 Years

 

$1,699.00

Contact Us For Stock Availability

Specifications:

 

Optical Design ED Refractor OTA
Model Number SWBDED80-OTA
Aperture 100mm
Focal Length 900mm
Eyepieces LET28mm
Focuser Diameter 2″
Finder Scope 8 x 50mm
Diagonal 2″ 90º Dielectric Diagaonal
Highest Practical Power 200x
Recommended Usage For the Professional
Tube Dimensions 10cm x 92cm
Shipping Weight 12.2kg

 

In the Box:

  • ED100 OTA
  • 2″ Diagonal
  • 1.25″ Focuser Adaptor
  • 8×50 Finder scope with Bracket
  • Eyepiece
    • 5mm
    • 20mm
  • Tube Ring Attachment to Any Sky-Watcher Mount
  • Piggyback Bracket
  • Aluminium Case

 

Metallic High-Transmission Lens Coatings (MHC)
Each air-to-glass lens surface has been coated by Sky-Watcher’s proprietary MHC. An anti-reflection metallic coatings which ensure optimum light-transmission approaching 99.5%.

Light-Baffled Optical Systems
The objective lens cell of this 100/900 Evostar ED Doublet OTA is light-baffled to reduce stray & unfocused light to insure optimum contrast. The interior of the tube is flat blackened to prevent unfocused internal light reflections from reaching the focal plane.

Precision 2” Crayford Focuser
This precision 2″ Crayford Focuser is mechanically ultra-smooth and backlash-free, offers you a fine and ultra-fine focusing adjustments.

Tube Materials
The optical tube material is rolled steel, powder-coated reflective gloss black with gold fleck accent. The front and back cells are cast-aluminum painted white & black.

Telescope Tube Attachment Hardware
The optical tube comes with attachment hardware that allows it to be securely fastened to any Sky-Watcher Mount. The quick-release tube rings provided with Evostar ED100 are cast-aluminium, painted white.