Levenhuk Ra 300N Dob Telescope Newtonian telescope. Primary mirror diameter: 300 mm. Focal length: 1520 mm. Levenhuk Ra 300N Dob Telescope is a Newtonian reflector on Dobsonian mount with 1520 mm (59.8 in) focal length and 300 mm (11.8 in) aperture. If you want to find the best powerful telescope that even an amateur stargazer can easily use, Levenhuk Ra 300N Dobsonian Telescope is what you are looking for! All optical elements are made of top-quality BK-7 glass and the telescope also has the built-in cooling fan for the primary mirror. This professional astronomy telescope comes with everything you need for your observations, including eyepieces for deep-sky observations. Levenhuk Ra 300N Dob Telescope includes: - Telescope optical tube - Dobsonian mount - Plossl eyepiece (9 mm) - SuperView eyepiece (30 mm) - 8x50 finder scope - Finder scope base - Cooling fan - User guide and lifetime warrantySpecifications: Optical design: Newtonian reflector Primary mirror diameter, mm: 300 Focal length, mm: 1520 Magnification, x: 600 Highest practical power, x: 300 Lowest practical power, x: 43 Focal ratio: f/5 Limiting stellar magnitude: 14.9 Resolution threshold, arcseconds: 0.46 Focuser: 2" dual-speed Crayford Mount type: altazimuth, Dobsonian Barrel diameter: 2", 1.25" Tube-mount assembly system: quick-release thumbscrew Finder scope: optical, 8x50 mm Eyepieces (included in the kit): 9 mm Plossl, 30 mm SuperView Primary mirror optics material: BK-7 glass Mirror shape: paraboloid Optical tube material: metal Optical tube length, in: 53.9 Optical tube diameter, in: 14.2 Mount dimensions, in: 24.8 x 25.1 Optical tube weight, lbs: 46.3 Mount weight, lbs: 29.7 Total weight, lbs: 94.8