I've been using this lens almost exclusively since I last posted about it, and have come to the conclusion that, bang-for-the-buck wise, it's the best lens I own. Up to around 70mm, F/5.6 gives the best results and F/8 for all lengths thereafter. I try and zoom with my feet if a shot is going to be longer than about 110mm. I'm REALLY interested now in the rumors, however shaky, about higher quality glass in this same focal length. For that matter, I'm also interested in the Oly 75mm/1.8 to complement this in the longest end. Forget the UWA lenses, although they do have their place. I've taken far more high quality and commercially viable shots with this lens than any other one I've got, and that's only in a few months of using it. Hornitos Road Oak, Fog #3 by tanngrisnir3, on Flickr Hornitos Road, Morning in the Forest by tanngrisnir3, on Flickr Hornitos Road Oak, Fog #2 by tanngrisnir3, on Flickr Hornitos Road Oak, Fog #1 by tanngrisnir3, on Flickr Morning Fog & Trees, Lone Madrone Vineyard by tanngrisnir3, on Flickr Morning Fog & Trees, Lone Madrone Vineyard #2 by tanngrisnir3, on Flickr Oh, and sorry, I've just been around a LOT of trees and fog lately. I cannot recommend this lens highly enough in terms of value in what you pay.