Blackmagic Television Studio HD8 Streaming 8L IS USM is a

8L IS USM is a versatile wide-angle to portrait-length lens characterized by its bright

Focal Length 135mm Lens Mount Canon EF Format Full Frame Maximum T-Stop T2

Eye Point 23 mm

so they don't disconnect

Blackmagic Television Studio HD8 Streaming 8L IS USM is aKey Features 8 Input 3G SDI 1080p60 Live Switcher Redesigned Buttons and Layout Streaming Support, USB & M. 2 Recording Blackmagic Cloud Integration Webcam Support, Runs Blackmagic OS Up to 16 Multiview Output Sources Audio Mixing, Transitions, T Bar, AUX Customizable Electronic LCDs Studio Camera Control Timecode, MADI, Talkback Live Production You get an incredibly powerful 8 input switcher with both program and two aux outputs, so you have