[tmd]

Also not an expert on the topic but here are some examples of space-ready cameras with pictures and specs: http://www.msss.com/space-cameras/

Obviously radiation, extreme temperatures, vibration, and vacuum are at least some of the problems. They explicitly state that lens have no moving parts, I’m not sure why that is an issue and how can they focus without moving parts - maybe they’re just permanently focused on infinity and hence close objects are blurrier?

Lens distortion might be just normal with uncorrected very wide angle lens which you want to make framing/steering easier. Otherwise you might need a separate camera just to help you aim the first one.