Science and technology have made large leaps since the beginning of the space exploration era.
We get amazing pictures from probes exploring our Solar system.
Possibly many challenges of all possible impacts and hazards have been addressed, from discoveries of new materials, new inventions, all this fed by experience drawn from numerous projects.
What are challenges* yet unsolved to build a camera capable to say shoot hi res** pictures of our Earth from the moon and radio them back to Earth beyond standard protocols? Sure the overall task is still far from trivial but the effort can't be same as earlier, or?
* In this context, a challenge is something an engineer could address without trying to override laws of physics.
** In this context, hi res means "good enough", same resolution as achieved by recent missions for example Cassini, this camera had afaik 1MP and created amazing pictures also from larger distance, like of Titan from 339000 km while distance from Earth to moon is 384400 km.