Hi, everyone. My first post, been a long time reader of course. I have used your guys recommendations before and won't hesitate to again! Andrew, that 28-105 looks nice and inexpensive. Might try it speedboosted on my gh4. Has anyone used the Sigma 20mm f/1.8 before? (pentax k or nikon mount with aperture ring) You can get them used for fairly cheap and I was thinking of trying it speedboosted. Should make for a super fast wide on m43. http://www.amazon.com/Sigma-Aspherical-Pentax-Samsung-Cameras/dp/B00005RKSN