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.
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
Optics type: Air-spaced doublet
Glass material: Crown/Flint
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 yearOrion Product Number: 09836