Objective lens diameter -15 mm Direction correction Rubicon coated lenses Mystery 30 x 60 binoculars. Fully coated optics for increased brightness. Instant focus lever for rapid focusing. Smooth center focusing Fold down eye-cups for spectacle wearers Ideal for yachting, hunting, bird watching, auto racing, horse racing, theater, boating, surveillance and security as well as other outdoor recreations. Size11*9*5cm