Perfect on a LUMIX GM1

The objective is of robust construction (unlike the kit lens of GM1). The optical quality is excellent and the AF almost instantaneous. It fits perfectly to the Lumix GM1 in both length and diameter (same diameter as the goal of platinum). It comes with a sun visor.

The ring map is very nice but does not have stumbled. The aperture ring has a self position in addition to the openings. In iA mode, so you can easily switch from one mode to Automatic Opening on the ring by selecting the auto position or opening.

The focal length is ideal for me and can do everything (landscape, portrait, proxi,). You just need to have room to advance or rewind.