Panasonic - Panasonic Lumix S1 with MC-21 EF to L Adapter
Amazon.com : Panasonic LUMIX S1 Full Frame Mirrorless Camera with 24.2MP MOS High Resolution Sensor, L-Mount Lens Compatible, 4K HDR Video and 3.2” LCD - DC-S1BODY Black : Electronics
Panasonic S1 Lumix Mirrorless Digital Camera (DC-S1 Camera Body) | B&H
The S1 vs. the S1H: What Makes a Video-Focused Camera?
Lumix S DC-S1 - Panasonic India
Panasonic Lumix S1 Review from a Sony Photographer