Orion - 80mm f/11.4 Refractor Telescope Optical Tube

    * Ideal for use as a guide scope
    * Guiding enables long exposure astrophotography
    * 1.25" focuser
    * One-year limited warranty

This quality Orion 80mm F/11.4 Refractor Telescope Optical Tube makes the perfect guide scope for doing long-exposure
astrophotography. The 80mm-diameter air-spaced achromatic lens has a focal length of 910mm (f/11.4) and provides plenty of light
collection for targeting faint guide stars. Multicoatings keep light loss from reflection to a minimum. The rack-and-pinion
focuser (1.25") is made of aluminum and features a focus lock knob. The aluminum telescope optical tube is finished in glass black
enamel and has an aluminum dew/glare shield. Six internal baffles prevent internal glare and provide great image contrast. No
finder scope, diagonal, telescope eyepiece, or guide scope rings are included. 

Use 	Astronomy
User level 	Advanced
Optical design 	Refractor
Optical diameter 	80mm
Focal length 	910mm
Focal ratio 	f/11.4
Coatings 	Multi-coated
Optics type 	Air-spaced doublet
Glass material 	Crown/Flint
Eyepieces included 	None
Resolving power 	1.45arc*sec
Lowest useful magnification 	12x
Highest useful magnification 	160x
Limiting stellar magnitude 	12.2
Optical quality 	Diffraction limited
Focuser 	1.25" Rack-and-pinion
Mount style 	Optical Tube without Mount
Tube material 	Aluminum
Length of optical tube 	34.7 in.
Weight, optical tube 	4.5 lbs.
Warranty 	One year

Included Items:
Optical tube assembly
Dust cap
Starry Night special edition software