102 mm Wide View
Item #: 52270Description
Specifications
General | |
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Aperture: | 102mm (4.02") |
Focal Length: | 500mm (20") |
Focal Ratio: | f/4.9 |
Angle: | 45° |
Focal Length of Eyepiece 1: | 25mm (0.98") |
Magnification of Eyepiece 1: | 20x |
Focal Length of Eyepiece 2: | 10mm (0.39") |
Magnification of Eyepiece 2: | 50x |
Finderscope: | 8X20 Erect image |
Highest Useful Magnification: | 241x |
Lowest Useful Magnification: | 15x |
Limiting Stellar Magnitude: | 12.5 |
Resolution (Rayleigh): | 1.37 arc seconds |
Resolution (Dawes): | 1.14 arc seconds |
Light Gathering Power (Compared to human eye): | 212x |
Apparent Field of View: | 2.5° |
Linear Field of View (@1000 yds): | 131 ft (40 m) |
Eye Relief: | 22mm (0.87") |
Close Focus: | 15 ft (4.57 m) |
Optical Coatings: | Fully Multi-Coated |
Optical Tube Length: | 533mm (21") |
Weight: | 80 oz (2268 g) |
Camera Adaptable: | Built-in T-thread on focuser |