Bruce Murray Space Image Library
Test image from Curiosity MARDI containing Ken Edgett
![Test image from Curiosity MARDI containing Ken Edgett](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x896_crop_center-center_82_line/mardi_ken_rock_color_chart_ruler_rock5imc.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x573_crop_center-center_60_line/mardi_ken_rock_color_chart_ruler_rock5imc.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x430_crop_center-center_60_line/mardi_ken_rock_color_chart_ruler_rock5imc.jpg 576w)
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.