Last Thursday Curiosity took photographs of one of its two moons, Phobos partially eclipsing the Sun. The photos have not been completely sent back or processed yet but the ones that have been released are pretty cool.
The mast camera had to take precautions to make sure that a neutral density filter cut down the glare from the Sun.
Thsi was a planned event by mission controllers and better photos will be forthcoming......but still an amazing feat.
Sky Guy in VA