Bruce Murray Space Image Library
Test image from Curiosity MARDI containing Ken Edgett
The other hand holding the ruler, on the right, is that of the MARDI Principal Investigator, Michael Malin. The MARDI is focused at 7 m, so that everything between about 2 meters and infinity are in focus. This image shows a slightly out-of-focus rock (a rounded cobble of Icelandic basalt with milimeter-scale crystals and vesicles) at a distance of about 70 cm, 2.3 feet), equivalent to the distance MARDI will be from the ground after the rover has landed.