I bought this lens during a trip to Japan to replace my Olympus 12-50mm. The lens is nice, smaller than the Panasonic 14-45mm, the rear mount is plastic. The Pana 14-42 II is lightweight but looks solid. Autofocus is fast, but not as fast as the Pana 25mm 1.4; However, it is as fast as the Pana 14-45mm. Image quality is very good, very sharp with wide open shots and maximum zoom. I had Olympus 14-42, 12-50, Pana 14-45, Pana 20 1.7, Pana 25 1.4. I haven't had much time with Olympus 14-42 and 12-50mm but I think Pan 14-42 II is better than KIT Olympus in terms of IQ, comparable to Pan 14-45 but a comparison with Pan 20 1.7 is it not discussed or 25 1.4. I bought this lens for its weight, IQ, autofocus and color, which goes very well with the OMD silver. When zooming, the lens extends about 0.5 cm. Finally, the built-in optical power stabilization will not activate when mounted on an Olympus body, so there will be no collision with IS on an Olympus body. It can only be activated on a Panasonic body (that's what Panasonic says).
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