I sold all of my Sony full frame equipment and switched over to Panasonic bodies (GH4, G7, GX7) and Panasonic lenses (12-35, 35-100, 100-300, 15, 25, 45 macro, 14-140ii). I have recently purchased a Olympus E-M5ii and E-M1, along with the Olympus 12-40 pro lens. I actually prefer the Olympus over the Panasonic bodies. How well do Panasonic lenses perform on Olympus bodies? I plan to sell my Panasonic bodies and am considering replacing the Panasonic lenses with Olympus. I really love the quality of the 12-40 (better than the 12-35 IMO). I have read many people having issues with purple fringing when using Panasonic lenses on Olympus bodies. Am I better off just using Olympus lenses on my Olympus bodies? Or are the Panasonic just as good?