Curiosity Left Mastcam (M-34)

Sol 320 00:01 Site 6/0804 0320ML1052000000D1_DXXX
Flat field images for calibrating Mastcam cameras [observations]
Jan 1, 2000 at 11:58:56 AM UTC (approximate)
Credit: NASA / JPL-Caltech / Malin Space Science Systems

Image Source