Leica has a new camera for its popular SL Series, and it’s claiming the SL2-S is its best model so far for those who want to do both still and video work. Packing a new 24-megapixel BSI-CMOS sensor, the SL2-S trades the huge resolution of the SL2 in favor of speed and versatility.

So, while you may not get the 47-megapixel sensor that helps make the SL2 so popular, the idea is that you can make more use of what the SL2-S does bring to the table. 
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https://www.slashgear.com/leica-sl2-s-puts-the-emphasis-on-speed-and-photo-video-versatility-10650473/