What range of magnification did Galileo's best instruments achieve during his famous observations?

Answer

Around 20x to 30x

Galileo rapidly improved his instruments, and his final, best models achieved magnifications in the range of 20x to 30x, which was sufficient to overturn existing cosmological thought.

What range of magnification did Galileo's best instruments achieve during his famous observations?
Galileo GalileitelescopeAstronomerinstrumentOptic