Back in 2008, Panasonic and Olympus launched the Micro Four Thirds System (M4/3). Since then, Panasonic in particular has released renowned cameras like the Lumix GH5 and GH5s, touting superb video performance and the G9 which is awesome for photography. Now, Panasonic has taken one step further, and the Lumix S1 and S1R are the company’s first foray into the Mirrorless Full-Frame market. Along with that is the L-Mount Alliance, a joint venture between Leica, Panasonic and Sigma! So, we have here the Lumix S1R, with all three of Panasonic’s L-Mount lenses, along with a Leica Summilux SL 50mm F/1.4 and even two other Sigma Art lenses with the MC-21 L-Mount Adapter! So, is this all new Full-Frame S1R worth it? Well, let’s just say, you’ll be amazed. *Audio in this review is recorded with all new audio gear, Sennheiser XS Wireless Digital Series *The Sigma Mount Converter MC-21 is not compatible with Leica’s existing L-Mount cameras due to changes in specifications. *Specifications for the S1R video footage are as follows, 3,840 x 2,160 UHD 4K MP4 / 100Mbps 25 Frames per Second / PAL Picture Profile – CineLike D (Saturation -2, Hue -2, All else 0) Color Temperature – 5600K Aperture – F/1.4 ISO – 1,600 Handheld Premiere Pro Lumetri Color Basic Correction for S1R video footage Temperature -25 Tint -5 Exposure +0.5 All else default