Celestron SkyMaster Giant 15x70 Binoculars with Tripod Adapter Multi-coated optics Large aperture perfect for low light conditions and stargazing Tripod adapter. 13 mm (0.51 inch) long eye relief ideal for eyeglass wearers Diopter adjustment for fine focusing. Angular field of view 4.4 degrees Large 70 mm objective lens offers maximum image brightness in low-light and long-range conditions