Here's an interesting comparison: The lens on the G1X Mark II is a 12.5-62.5mm (24-120mm equiv) f/2.0-3.9, and it looks to be almost the same size as the Olympus/Panasonic f/3.5-5.6 pancake lenses with much shorter zoom ranges. Bearing in mind that the G1X Mk II has a slightly larger sensor than Micro 4/3, I wonder why no such lens has been developed for MFT. The G1X Mk II sells for $799, so the manufacturing cost of its lens must be considerably less than that. There's a crazy size difference between the G1X Mk II's lens and the Olympus 12-50,despite the Canon lens covering a larger sensor, having a longer zoom range, and being almost two stops faster. Oh, and the G1X Mk II's lens has a built-in, self-retracting lens cap. IMO the G1X Mk II's lens would be the perfect "do it all" lens on MFT...considerably smaller than the existing 12-35 or 12-40 f/2.8, 1 stop faster at the wide end, and much more reach at the long end. What do you think is stopping Olympus or Panasonic from making a similarly sized fast-zoom for Micro 4/3?