In this video, Bohus shows you how to adjust the back focus of your B4 Lens for use with the B4 Magic lens adapter from Fotodiox. Want to add a powered zoom lens to your Blackmagic Pocket Cinema Camera? Now you can with the B4 Magic Lens Adapter and PowerLynx Kit from Fotodiox! To date, connecting powered zoom lenses to modern cameras has been more trouble than it’s worth, but the PowerLynx Kit makes it easy and affordable. What’s more, you’ll be able to combine the smooth, cinematic effects of B4 ENG lenses with the amazing power of your Black Magic Pocket Cinema Camera.