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1.Orion EON 80 ED Complete DeepSpace Imaging Package
Use Astronomy & terrestrial
User level Beginner
Optical design Refractor
Optical diameter 80mm
Focal length 500mm
Focal ratio f/6.2
Coatings Fully Multi-coated
Optics type Air-spaced doublet
Glass material Extra low dispersion FPL-53
Eyepieces included None
Resolving power 1.44arc*sec
Lowest useful magnification 12x
Highest useful magnification 160x
Limiting stellar magnitude 12.2
Optical quality Diffraction limited
Finder scope None
Focuser 2" Crayford
Mount style Optical Tube without Mount
Astro-imaging capability Lunar, planetary & long exposure
Tube material Aluminum
http://www.telescope.com/control/product/~category_id=refractors/~pcategory=telescopes/~product_id=24772Цена - 900.00 ye
2. Orion Premium 102mm F/7 ED Refractor Telescope
Use Astronomy & terrestrial
User level Advanced
Optical design Refractor
Optical diameter 102mm
Focal length 714mm
Focal ratio f/7.0
Coatings Coated
Optics type Air-spaced doublet
Glass material Extra low dispersion
Eyepieces included None
Resolving power 1.14arc*sec
Lowest useful magnification 15x
Highest useful magnification 204x
Limiting stellar magnitude 12.7
Optical quality Diffraction limited
Finder scope None
Focuser 2" Crayford
http://www.telescope.com/control/product/~category_id=refractors/~pcategory=refractors/~product_id=09012Цена - 900.00 ye
3. Vixen ED81S Refractor Optical Tube w/ Accessories
Use Astronomy
User level Expert
Optical design Refractor
Optical diameter 81mm
Focal length 625mm
Focal ratio f/7.7
Coatings Multi-coated
Optics type Air-spaced doublet
Glass material Extra low dispersion
Resolving power 1.05arc*sec
Lowest useful magnification 12x
Highest useful magnification 162x
Limiting stellar magnitude 11.3
Optical quality Diffraction limited
Finder scope 7x50
Focuser 2" Rack-and-pinion
Diagonal 1.25" 90-deg Flip mirror Star
http://www.telescope.com/control/product/~category_id=refractors/~pcategory=refractors/~product_id=08016Цена - 1 200.00 ye
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