camera has 71 questions, and has the guidance text "Questions about imagery devices on spacecraft and probes."
spacecraft-cameras has 26 questions, and no guidance text.
It appears that the latter is simply a subset of the former. The latter has questions about cameras affixed to spacecraft or on robotic arms, how they are designed/built, and their image artifacts. The former seems to include these, plus handheld cameras (e.g. Hasselblad), those affixed to spacesuits, those at launch or landing sites, adapting commercial cameras for space usage, calibration, and camera damage. Twelve questions carry both tags.
Do we need both of these tags? Is there a meaningful and useful distinction?
There is also a photography tag, but I believe it is distinctive enough to warrant a separate tag.