[John_KZ]

>optics are heavy

It depends on the optics. Modern optics for the visual range are incredibly light.

Also, since you assume optics are heavy, why do you think putting them on a drone is a good idea? You can haul a metric ton of optics in space for years (if not decades) but that drone can probably carry a handful of kg of equipment, and not that many cameras.

[andbberger]

My point is that you can't just conclude a prior that the capabilities could be matched by an orbiter. You need bigger and thus heavier optics to match the performance of a camera on the ground from orbit. The extra mass for the drone might be less than that needed for the larger optics.