Calibration on Mars

Here is some interesting reading for the geeks among us who might be curious how one goes about calibrating a camera on Mars: 

• http://www.wired.com/curiosity-mars-rover-cameras/

And here are some details about the calibration target used on the Curiosity:

• http://mars.jpl.nasa.gov/msl/images/?ImageID=3804

Quiz your fellows over the water cooler: How much US currency is on Mars?

Actual pictures from Mars coming to us over the next few weeks & months promise to be high quality, clear and sharp.  Not the sorts of images we're used to seeing from other planets!