I swap lenses frequently (with legacy lenses) and the only native m43 lens I have is the MK1 kit lens. Sometimes when reattaching the lens it won't work until I reattach and detach it again several times with the camera on. Any idea's why? Sidenote: Can't wait for my tax return so I can actually purchase a native lens and use autofocus! I'm thinking about one of the new sigma lenses after using a 35mm Takumar extensively on my Spotmatic and loving the FOV.