I'm not sure if my Panasonic 100-300mm is a bit rough around the edges, or it's just that the Olympus 75mm is that good, but I can't bring myself to use my 100-300 unless I really, really have to. The strange thing is that when I previously owned :43: kit I loved my 100-300. The difference in detail, colours, sharpness and contrast is so big that anything from the Panasonic just feels incredibly disappointing now. A couple of examples below, the Oly 75mm images have been cropped by a minimum of 50%, but the difference is still incredibly obvious in my opinion... Kennet and Avon Canal by Harry_S, on Flickr Kennet and Avon Canal: Canada Goose by Harry_S, on Flickr Kennet and Avon Canal: Robin by Harry_S, on Flickr Kennet and Avon Canal: Robin by Harry_S, on Flickr Could it be technique? My 100-300 shots just feel soft regardless of what I do, ironically as I use a G5 the 100-300 is stabilised, but the Oly 75 isn't!