The olympus nature 8x42 exps i binoculars offer a host of highly advanced features such as bak4 prisms and fully multi coated lenses to guarantee crisp sharp images in even difficult light condition long eye relief ensures comfortable viewing for spectacle wearers and those without glasses while non slip rubberised coating and grips provide a sure hold and make the binoculars as comfortable in the hand as they are on the eye the large centre focus knob can be used while wearing gloves and th