Thanks for this, very interesting. I have the panasonic 14-50mm 2.8-3.5 and it is my favourite lens by far. Excellent flare resistance, and my copy seems to be very sharp, with very good colour. I also have the Zuiko 12-60mm. Its very sharp, but flare resistance is not as good, and I feel the 14-50mm just produces better pictures. (Especially for portraits with out of focus areas). The 12mm is great for street and landscape photos. I prefer the output of the 11-22mm. The 12-60mm is great for convience and a wall around lens. Whats most interesting is that I find the m.zuiko 14-42mm (original) to be very good and have good contrast/colour redition. Maybe its the new coatings. Also the m.zuiko 40-150mm. I would rate the apparent sharpness of the 14-50mm above the 14-42mm. No scientific testing, just impression. Most of my photos are taken at f7.1. Thanks for the interesting post.