The pentax pf 65 edii straight spotting scope features a 65mm objective lens with extra low dispersion optical elements to ensure the view is sharp and full of contrast designed for high precision outdoor viewing the pentax pf 65 edii spotting scope is waterproof and nitrogen filled jis class 6 to ensure a worry free experience in all weather conditions the conveniently placed focusing wheel sits in the centre of the scope for easy reach and the durable rubber armoured body provides plenty