Celestron Cometron Firstscope Telescope - 21023 KIDS & BABYS
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Celestron Cometron Firstscope Telescope - 21023
- Optical Design: Newtonian Reflector
- Aperture: 76mm (2.99")
- Focal Length: 300mm (12")
- Focal Ratio: f/3.95
- Focal Length of Eyepiece 1: 20mm (0.79")
- Magnification of Eyepiece 1: 15x
- Focal Length of Eyepiece 2: 10mm (0.4")
- Magnification of Eyepiece 2: 30x
- Barlow Lens: Not Included
- Finderscope: 5x24
- Star Diagonal: Not Included
- Optical Tube: Plastic
- Highest Useful Magnification: 180x
- Lowest Useful Magnification: 11x
- Limiting Stellar Magnitude: 11.9
- Resolution (Rayleigh): 1.83 arc seconds
- Resolution (Dawes): 1.53 arc seconds
- Light Gathering Power (Compared to human eye): 118x
- Secondary Mirror Obstruction: 28mm (1.1")
- Secondary Mirror Obstruction by Diameter: 37%
- Secondary Mirror Obstruction by Area: 14%
- Optical Coatings: Aluminum with SiO2
- Optical Tube Length: 266mm (10.5")
- Optical Tube Diameter: 95.25mm (3.75")
- Optical Tube Weight: 1.4 lbs (0.64 kg)