Sky Watcher 120/900 Evostar ED Doublet OTA

The larger aperture of the Sky-Watcher 120/900 Evostar ED Doublet OTA provides you a dramatic increase in resolution and observe the lunar and planetary surface phenomenon in 3D-alike high-definition.

The tight globular star clusters appear like a beehive of crisp stellar pin points, star upon thousands of stars deep into the objects core.

For Deep-sky observation, rich aggregates of stars within Galaxies, Nebulas, and open clusters appear brilliant contrasted against a very dark velvet black background.


  • Aperture: 4.7″ (120.0 mm)
  • Focal Length: 900 mm
  • Focal Ratio: F 7.5
  • 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


Original price was: $4,249.99.Current price is: $3,499.00. inc GST

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120/900 Evostar ED Doublet Refractor OTA

  • Suitable for Astrophotography
  • View Solar System in High Definition
  • Metallic High-Transmission Coatings
  • Compact & portable
  • Comes with an Aluminium Case
  • 5 Years Sky-Watcher Limited Warrant


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 Sky-Watcher 120/900 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 ED80 are cast-aluminum, painted white.


In the Box:

  • ED120 OTA
  • 2″ Diagonal
  • 1.25″ Focuser Adaptor
  • 8×50 Finderscope with Bracket
  • Eyepiece – 28 mm LET 2″
  • Tube Ring Attachment to Any Sky-Watcher Mount
  • Piggyback Bracket




Optical Design ED Refractor OTA
Model Number SWBDED80-OTA
Aperture 120mm
Focal Length 900mm
Eyepiece 28 mm LET 2″
Focuser Diameter 2″
Finder Scope 8 x 50mm
Diagonal 2″ 90º Dielectric Diagaonal
Highest Practical Power 240x
Recommended Usage For the Professional
Tube Dimensions 10cm x 92cm
Shipping Weight 14.5kg
Recommended Usage Astrophotography, Viewing Galaxies/Stars/Nebulae