Compared to modern imaging technology, the sensor that went to Mars sounds positively archaic — but it's there for a reason
On paper, the hardware on the Mars Rover Curiosity sounds kind of underwhelming to a gear head — just 2-megapixels and only 8GB of onboard storage? That's worse than an aging smartphone. As piddling as that may seem, NASA had a reason for picking that setup, and it's one that makes sense both for when the project was assembled, and what it was designed for.