Summary: The lens is fine, but a 7 - 18 would be much better. It isn't quite wide enough for all purposes. I really don't lock the unlock feature. I find it annoying and I am not sure why they have it. Picture quality, build and focus is as expected with all Olympus lenses, excellent.
... with the micro 4/3 Olympus E-M1 and I'm not disappointed, it's a good match
14 October 2014
Summary: I purchased this lens for use with the micro 4/3 Olympus E-M1 and I'm not disappointed, it's a good match. It a very decent wide angle lens with very little distortion at 9mm. I find it great for indoor shooting where wider angle is desirable, but distortion is not.
Excerpt: Using on a Panasonic GH4, it's my backup 4K video camera and so far this lens covers my off the shoulder wide stuff perfectly! The little "unlock to compress" design is kind of meh for me, it's already small enough.
Pros: Durable, Fast / accurate auto-focus, Lightweight
Try it by yourself and you will know why I say "YES"?
2 October 2014
Summary: This product is excellent in Zoom out the most, so you can gather the whole big picture into optimal size that you want. And later you can use photo edit or zoom in to see other details, and best of all, after you are zoom in (Magnified), you still can see very clear picture from this lens.