re: "sun pictures" from the rovers
They take images of the sun almost every day - to measure atmospheric opacity and calculate the position of the sun in the sky to better aim the HGA.
During Opposition, both rovers were commanded to do some imaging - and this looks to have been the usual course of Sundial and Solar imaging to monitor atmospheric conditions during that period.
There is a solar filter (L8) that is essentially a very very dark filter to ensure they dont trash the CCD with these obs.
Doug