If you own a Canon DSLR and a EF-S 17-55 mm F2.8 IS USM lens, you don’t need to read this. Just click the buy button below. If you don’t, or you’re curious about what exactly the Hoocap does, keep reading. The Hoocap is quite possibly one of the greatest innovations in photography since, well, single-lens reflex went digital. Half lens cap, half hood and capable of transforming from one to the other in a click of a button, the Hoocap is an easy choice for anyone that shoots Canon with an EF-S 17-55 mm F2.8 IS USM lens. If you’re rocking Leica, Nikon or Sony, there’s a Hoocap on the way for you too; you’ll just have to wait.