The first version of a Mars 2020 rover zoom camera to be fully assembled -- the Mastcam-Z Engineering Qualification Model -- on a lab bench at Malin Space Science Systems, Inc., in San Diego. The wiring harness hasn't yet been completed in the flight-like configuration, so there's a bit of a "rat’s nest" of motor and Hall sensor wires. But... it works!
This image is in the public domain.
Original image data dated on or about January 29, 2018