I recently bought the 14-54 Mk 2 lens after selling my Mk1 version. It seems noticeably faster to focus; in comparisons with my m4/3 lenses at 20mm, it is about as fast to focus as the kit lens, a bit slower than the 20 or the 14-140. On low contrast subjects - it fails to focus on a dimly-lit white wall, just like the kit lens; where both the 20 and the 14-140 can focus. It provides a fast, high-quality zoom lens using a 4/3 adapter). In many ways, this is the lens that is missing from the m4/3 world - and ideal all-purpose, reasonably low-light, good bokeh zoom. I haven't noticed much on it on the m4/3 forums and just wondered whether any of you were using it?