Euro Diamond binoculars feature premium optical glass and prisms that arevery low tolerance precision ground and polished for super sharp distortionfree viewing. Every lens surface is broad band multicoated for reflectionfree bright images and the prisms include ultra premium multicoating andphase correction coating as well as silver coating for the ultimate inviewing performance. Not only are Euro Diamond binoculars standard in imagequality, they provide a generous eye relief for eyeglasses or sunglassesand a very expansive field of view. All Euro Diamond binoculars are fullywaterproof, fogproof, highly shock resistant.