When I shot more mu43 cameras, the magic lens was the Lumix 20 .17. Small, light, and wonderfully sharp. It focused slowly because the all the elements moved as a unit. The current 27 is very much the Fuji sibling for that lens, except it focuses faster. I'd have to try it, but is suspect it will be a bit fiddly to use an aperture ring on a lens that thin. Mine sits of the X-T30 and use the rear dial to change aperture. IMHO, all the lens mounts need a really good pancake 2.8 or faster in the 35-50 mme range.