120 x 400mm f/2.8 Camera lenses tells us something:
From RichA@21:1/5 to All on Sat Nov 20 21:42:33 2021
That decent science can be done on the cheap. $1.5M for the lenses, $5M for the sensors and electronics, some kind of rent for the land, a few hundred thousand dollars for travel and lodging each year. To study Dark Matter effects.
Contrast this with expected cost of the new land and space-based telescopes now being built (billions of $$$) or the physics experiments in CERN or the U.S.