FirstScope w/Accessory Kit
Item #: 21024-ADescription
Specifications
Optical Tube Info: | |
---|---|
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: | 4mm (0.16") |
Magnification of Eyepiece 2: | 75x |
Barlow Lens: | Not Included |
Finderscope: | Not Included |
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) |
Dovetail: | N/A |
Mount Info: | |
Mount Type: | Manual Tabletop Dobsonian |
Height adjustment range (includes mount and tripod): | N/A |
Tripod Leg Diameter: | N/A |
Slew Speeds: | Manual |
Tripod Weight: | N/A |
Dovetail Compatibility: | N/A |
Software: | Celestron Starry Night Basic Edition Software, and SkyPortal App |
Total Kit Weight: | 4.3 lbs (1.95 kg) |
Included Items: |
Optical tube Dobsonian Mount 10mm and 20mm Eyepieces Finderscope |