The Kowa Tsn-82SV 82mm/3.22"" Angled Spotting Scope is the modern iteration of Kowa's Tsn-821M scope, which endured for well over a decade as their premium design. The 82SV's a great choice if you want the very best in optics from a respected Japanese company without forking over an arm and a leg to get it.The Tsn-82SV was created using advanced optical technology and the best of materials known. Its 82mm objective lens gathers gobs of light, ensuring a bright field of view in nearly any practical nature viewing. It makes for a great casual-use astronomical scope. The 82SV is offered exclusively as an angled viewing design. While it isn't a matter entirely settled until you experience the differences for yourself, it is nearly a universal belief that the angled scopes offer a more comfortable time of longer glassing and are unequivocally easier to share amongst a group of observers. You can also get away with a shorter tripod using the angled scope, perhaps shaving precious ounces off your pack weight. Angled scopes do require a bit more experience at locating the subject if you're tall and equipped with a tall tripod and primarily viewing alone, a straight viewing scope is often preferred..