From about 185 miles, objects as small as 35 inches can be detected.
A two-year mission to analyze the Red Planet that will collect more data than all previous Mars missions combined begins in November.
Left is an image of Mars' north polar layered deposits taken by the High Resolution Imaging Science Experiment.
The left image from this strip of the Mars north polar region shows nearly true colors while the center photo shows the region as seen just beyond the range of the human eye. In the right image the ice is blue and dunes in the now-yellow area are much easier to see than in the other photos.
Geologists expect to learn new details of the history of the Red Planet by studying the exposed layers of rock on the inside of the crater.
An earlier photo shows the dunes on Martian surface that Opportunity traversed to reach the Victoria crater.
The rock abrasion tool (low center) from the other Mars rover robot Spirit became clogged with dust and bits of rock but scientists devised a way to run the tool in reverse to clear the debris and return it to full operation.
The lighter mounds are old while the dark sand dunes and intermediate ripples are new.
Here's a "spider web" from the Martian surface.