I use the lens on my Olympus M1 and am thrilled. There are currently not really an alternative to this objective. Have tried both 2.8 Zuiko. Processing and image quality great, but just too big and heavy. Extra've changed to Mirrorless system, so I take my camera while hiking and cycling again. The Panasonic is processed great, really makes crisp sharp images and has a continuous aperture of 2.8. For this it is incredibly compact !!!! The focal length range is almost perfect as it always objective. Additionally, I have for special situations even the Zuiko 25mm / 1.8 Zuiko 9-18, the simple and very easy, inexpensive Zuiko 40-150 for more telephoto, and the Zuiko 12-50 The Sigma 14-150 and the 14-150 Zuiko have failed with me because of the image quality and brightness. That also good Zuiko 45 / 1.8 gave way for the Panasonic.
