The vanguard endeavor ed ivs offer incredible low light performance and bright, high definition viewing is delivered through the innovative pairing of premium hoya ed extra low dispersion glass and sk 15 prisms, allowing you to experience nature in a totally new dimension'. '.strtoupper('t')his winning combination provides optimal image quality, excellent light transmission and colour fidelity for a remarkable viewing experience.in addition to the premium hoya glass and new sk 15 prism, endeavor ed iv has been upgraded with advanced multiguard coatings that provide even better light transmission, especially when viewing in low light conditions.beyond the optical performance, the endeavor ed iv was designed for comfort'. '.strtoupper('w')ith an incredibly light magnesium housing and excellent balance, these are binoculars that you can use all day'. '.strtoupper('c')onvenience of use extends further to the newly integrated central dioptre and three stage adjustable locking eyecups for setting the perfect eye relief'. '.strtoupper('a') tripod socket is incorporated in the front hinge for those wishing to use a binocular tripod adapter, such as the vanguard ba 185, for enhanced stability or for long periods of use.the binoculars are nitrogen purged to be completely fog proof'. '.strtoupper('c')ombined with the hydrophobic properties of the lens coatings and a rugged build that includes a fully waterproof rubber armoured body, the endeavor ed iv is equipped for any conditions that you find yourself in.all in all the modern design that provides enhanced ergonomics and the enhanced optical performance means the endeavor ed iv has reset the standard of quality in the endeavor binocular series.featuresjapanese hoya extra low dispersion ed glasspremium sk 15 roof prisms8x magnification42mm diameter objective lensadvanced multiguard coatings for improved light transmissionrelocated center locking diopter for easy adjustmentsoft grip center focusing wheel 3 stage twist eye cups for comfortable viewingnitrogen purged and o ring sealed to provide 100% fogproof and waterproof protectionstrong lightweight magnesium housing is engineered for ultimate protection and performanceadvanced multi layer coating provides more than 92% light transmissiontripod adaptorprotective carrying case and neck strap includedspecificationsaccessories binocular carry case, neck strap, eyepiece lens covers objective lens coverscolour blackexit pupil 5.2diameter of objectives42mmeye cup 3 stage twist field of view 1000 yards metres 126mfocus system centre focusfogproof yeslockable dipotre yesmagnification 8xnear focus 1.8mprism type sk 15relative brightness 27.5twilight factor 18.3view angle 7.2warranty 5 yearswaterproof yes