In several scenes of season 2 of The Mandalorian, the titular character uses a tiny telescope (possibly a rifle scope?) to look at certain objects, such as a gigantic dragon which is so close there's no conceivable reason to need magnification.
This scope looks like it's about an inch in diameter, so small that you would not actually be able to see through it unless it was pressed against your eyeball. Furthermore, later in the season he uses the zoom feature that's already built into his helmet several times. So what's going on here?