Just had to find out what all the fuss was about the Olympus 12-100 f4 Pro lens, so I rented one to compare with my Lumix 12-60 f3.5-5.6 and my Lumix 45-175 f4-5.6. Now, both my Lumix lenses possess extremely good IQ, but I didn't expect them to be as good, if not better than the Oly 12-100...