I hate to see high end porro prism binoculars go the way of the dinosaurs, but the sleek and sexy roof prism binocular gets all the attention, these days, at least in the premier binocular category. That's too bad, because great porro prism binoculars like the now disappearing Nikon Premier SE can hold their own, optically, with all the roof prism heavyweights and do it at a fraction of the price. About the only place the premium porro prism binocular holds its own is in astronomy binoculars and military/marine binoculars where performance and durability are more important than handling qualities. Long live the porro prism binocular.