Orion AstroView 120ST EQ Refractor Telescope Kit with Eyepieces, 600mm Focal Length

SKU: ONAV120STE MFR: 09005
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About this item

The Orion AstroView 120ST EQ Refractor Telescope is a compact, rich-field refractor designed for observation of nebular clouds, star clusters and even galaxies. It has the same 120mm (4.7") clear aperture as the standard AstroView 120, but the 120ST's multi-coated achromatic objective lens has a focal length of just 600mm (f/5) compared to 1000mm (f/8.3) for the standard model.

That translates to a 66% wider field of view for any given eyepiece. With the included 25mm Plossl, the 120ST covers a sprawling 2.1° swath of sky - enough to display the entire Double Cluster, Pleiades Cluster, or North America Nebula! The fast f/5 optical system also makes it an excellent telescope for astrophotography. The cast-metal 2" rack-and-pinion focuser accommodates either a 1.25" or 2" diagonal, so you can use optional 2" eyepieces for an even dreamier wide-field effect. The 6x30 finder scope features an aluminum dovetail bracket with easy, two-screw adjustment. The two 1.25" Sirius Plossl eyepieces provide good, sharp views at 24x (25mm focal length) and 60x (10mm focal length).

A 1.25" mirror star diagonal is also included. The optical tube measures just 26" long including dew shield, so it earns high marks for portability. It comes with the AstroView equatorial mount, which provides the stability and smoothness of motion you need for enjoyable wanderings through the heavens. A free polar-axis scope gets you polar-aligned quickly and accurately and manual slow-motion controls let you center objects and track them effortlessly. Add an optional EQ-3M electronic drive for automatic tracking. The aluminum tripod adjusts in height and includes a roomy accessory tray.

What's Included With This Item

  • Orion Optical Tube Assembly
  • 25mm Sirius Plossl Eyepiece (1.25")
  • 10mm Sirius Plossl Eyepiece (1.25")
  • 90-Deg Mirror Star Diagonal (1.25")
  • 2" to 1.25" Eyepiece Adapter
  • Tripod Legs
  • Equatorial Mount
  • 6x30 Finder Scope
  • Finder Scope Bracket with O-ring
  • Tube Rings
  • Polar Axis Finder Scope
  • 7.3 lbs Counterweight
  • 3.8 lbs Counterweight
  • Counterweight Shaft
  • Tripod Accessory Tray
  • Starry Night Special Edition Software
  • Orion 1 Year Limited Warranty

Key Features

  • A wonderful telescope for viewing the moon, planets and even deep-sky objects
  • 120mm aperture and 600mm focal length for sharp views of nebular clouds, star clusters and galaxies
  • Includes sturdy tripod, equatorial mount for hands-free celestial tracking & polar alignment scope
  • Includes two eyepieces, finder scope, focuser, diagonal and Starry Night astronomy software

Technical Specs

Use Astronomy
User level Intermediate
Optical design Refractor
Optical diameter 120mm
Focal length 600mm
Focal ratio f/5.0
Coatings Multi-coated
Optics type Air-spaced doublet
Glass material Crown/Flint
Eyepieces included Sirius Plossl 25.0mm, 10.0mm
Magnification with included eyepieces 24x, 60x
Resolving power 0.97arc sec
Lowest useful magnification 17x
Highest useful magnification 240x
Limiting stellar magnitude 13.1
Optical quality Diffraction Limited
Finder scope 6x30
Focuser 2" Rack-and-pinion
Diagonal 1.25" 90-deg Mirror Star
Mount style Equatorial
Astro-imaging capability Lunar & planetary
Dovetail bar system Yes
Motor drive compatibility Clock drive (sold separately)
Computerized compatibility Not compatible
Bearing material Friction bearings
Latitude range 18-63
Setting circles Yes
Polar-axis scope Included
Counterweights One 7.5 lbs, one 4 lbs
Tube material Aluminum
Tripod material Aluminum
Counterweight bar length 10 in
Diameter of counterweight shaft 20mm
Height range of mount/tripod 36.00 in - 56.00 in
Additional included accessories Polar alignment scope, 1.25" adapter, slow-motion control cables, dust cap, polar axis finder scope plastic cover, accessory tray bracket, wrenches, phillips-head screwdriver, flat-head screwdriver key
Other features 2" Focuser
Length of optical tube 24.5 in
Weight, optical tube 8.6 lbs
Weight, mount/tripod 16.5 lbs
Weight, fully assembled 36.3 lbs
Warranty Orion 1 year limited warranty
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