Mark: the world's first 4K drone positioned by Visual Inertial Odometry by Jose Antunes - ProVideo Coalition
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Mark Drone: The Ultra-intelligent 4K foldable drone, $239 by Mark — Kickstarter
4DRC 4D-M1 Professional 5G WiFi GPS Drone with 4K Camera
GEPRC Mark 4 7inch 4S/6S H Type FPV Racing Drone BNF for Freestyle
DxOMark benchmarks for popular drone camera sensors - DXOMARK