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Amazon.com : Panasonic LUMIX S1 Full Frame Mirrorless Camera with 24.2MP MOS High Resolution Sensor, 24-105mm F4 L-Mount S Series Lens, 4K HDR Video and 3.2” LCD - DC-S1MK : Electronics
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The S1 vs. the S1H: What Makes a Video-Focused Camera?
Panasonic Lumix DC-S1 review: Digital Photography Review
PENTAX Q-S1:A minimum-sized, lens-interchangeable digital camera providing fashionable design and exceptional operability|RICOH IMAGING