The G1 is as quiet as an M6 in terms of shutter noise.
If you shoot in a dungeon, you may have to focus wide open, but then you'd probably be shooting wide open, too. The EVF will brighten as the lens is stopped down, so it's pretty easy to focus at shooting aperture.
If you shoot in a dungeon, you may have to focus wide open, but then you'd probably be shooting wide open, too. The EVF will brighten as the lens is stopped down, so it's pretty easy to focus at shooting aperture.