A 'Game-changer': That’s How This Reviewer Describes the New Tamron 50-400mm f/4.5-6.3 Di III VC VXD

"Game-changer" is an oft-used buzzword these days, but seldom does the product live up to the hype. See why this photographer is adamant the new Tamron 50-400mm f/4.5-6.3 Di III VC VXD lens is indeed a game-changer.