120mm f/5.0 Refractor Telescope Optical Tube Assembly

Orion   ——   SKU: 09836
$389.00 CAD
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Product Info


About the Orion 120mm f/5.0 Refractor Telescope Optical Tube Assembly...

This compact, large-aperture Orion 120mm F/5.0 Refractor Telescope Optical Tube is perfect for deep-sky pursuits. Its 120mm (4.7"), multi-coated achromatic telescope lens assembly and modest 600mm focal length combine to provide breathtaking wide-field views. With an optional 25mm Plossl telescope eyepiece, this Orion Telescope serves up a sprawling 2.1 degree swath of sky!


The fast f/5.0 optical system also makes the Orion 120mm F/5.0 Refractor Telescope Optical Tube an excellent telescope for astrophotography. The 26"-long optical tube is well baffled to ensure good contrast. The cast-metal 2" rack-and-pinion focuser accommodates either a 1.25" or 2" diagonal, so you can use 1.25" or 2" telescope eyepieces. Tube color is gunmetal gray metallic. A mounting base molded into the focuser casting to accept an optional Orion finder scope or EZ Finder reflex sight. Sold as Orion Telescope tube assembly only without accessories. Includes objective lens cap.


Don''t forget... We carry many fine Orion Telescope Accessories, including Orion CCD Cameras and Orion Telescope Mounts!



Orion 120mm f/5.0 Refractor Telescope Optical Tube Assembly Features...


  • Rich-field refractor optical tube assembly with big 4.7" aperture for deep-sky pursuits and wide-field astrophotography use



  • 120mm aperture and 600mm focal length refractor provides crisp wide-field views exhibiting high contrast



  • Perfectly portable at just 8.6 lbs., makes for a great grab and go telescope



  • 2" rack and pinion focuser accepts both 2" and 1.25" eyepieces and accessories



  • Optical tube only - mount, tripod, and accessories sold separately



Orion 120mm f/5.0 Refractor Telescope Optical Tube Assembly Specifications...

Best for viewing: Brighter deep sky

Best for imaging: Deep sky

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: None

Resolving power: 0.97arc*sec

Lowest useful magnification: 17x

Highest useful magnification: 240x

Highest theoretical magnification: 240x

Limiting stellar magnitude: 13.1

Optical quality: Diffraction Limited

Finder scope: None

Focuser: 2" Rack-and-pinion

Mount type: Optical Tube without Mount

Astro-imaging capability: Lunar, planetary & long exposure

Tube material: Aluminum

Length of optical tube: 25.0 in.

Weight, optical tube: 8.6 lbs.

Additional included accessories: 1.25" adapter

Other features: 2" focuser

Warranty: One year

Orion Product Number: 09836