CES1156 Features: * Binocular viewer * Eyepiece diopter scales for sharp focus * Fully multi coated BAK-4 prisms * Foam lined aluminum storage case * Aperture (mm): 18 mm (0.71 in) * Highest useful magnification: 43 x * Lowest useful magnification: 2.57 x * Limiting stellar magnitude: 8.78 * Resolution (rayleigh): 7.74 arc seconds * Resolution (dawes): 6.44 arc seconds * Light gathering power: 6.61 x * Prisms: BaK-4 * Optical coatings: Fully multicoated with broadband coatings Dimensions: * Dimensions: 1.5"" H x 5"" W x 5"" D Warranty: * 2 Year warranty