Other Features | - Zoom Eyepiece, Sighting Tube, Soft Carrying Case Included, Refractor Objective, 540 mm Focal Length, 5.4 Focal Ratio, 236x Highest Useful Magnification, 14x Lowest Useful Magnification, 12.5 Limiting Stellar Magnitude, 1.39 arc seconds Resolution (Rayleigh), 1.16 arc seconds Resolution (Dawes), 204x Light Gathering Power (Compared to Human Eye), (28.9 m at 22x, 16.1 m at 66x) Linear Field of View at 1000 yards, 559 mm Optical Tube Length, Provides Exceptional Clarity and Brilliance, 100 mm Provides Best Performance in Low Light Conditions, Perfect for (Bird Watching, Nature and Wildlife, Target Shooting, Astronomy), Sleek Design Accented with Graceful Contours, Easy to Hold and Handle
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