In my experience the best results are achieved by keeping the shutter speed at ...
Peter Goonan, Amazon
9 September 2014
Summary: This is a magnificent lens, producing crisp images all through the focal range, and eliminates a lot of lens changeovers (which was a major reason for my buying it). In my experience the best results are achieved by keeping the shutter speed at 1/500, or faster, as you extend the lens (even though my camera has image stability), and I increase the ISO setting to achieve that end.
Excerpt: Used on an EM-1 and sometimes on an EPL-5, this is the Oly equivalent of Nikon/Canon 28-300 lens, but, at half the weight and nearly half the price. It has all the compromises of a 10.7 times zoom and the same small aperture. The difference is that Oly algorithms control distortion better than Nikon/Canon and this is a nearly distortion free lens in JPEG form.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight
Summary: I have had this lens for a while now and it has become my everyday lens. The only time I use another is if I need good macro ability as this lens does not do macro and that is why it only gets 4 stars. The control rings are both smooth and accurate. Great Lens.