Panasonic S1 10-bit and V-Log paid upgrade coming in July: Digital Photography Review
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 5.9K RAW firmware gets a firm release date
Panasonic S1 vs S5 - The 10 Main Differences - Mirrorless Comparison