I don’t need to say much about this one. Its simply a great lens with great sharpness and contrast but with bokeh that can look a bit busy and nervous depending upon the background. In Australia this costs about twice as much as the m43 100-300mm so one would expect sharpness and CA to be somewhat better than the 100-300mm and it is. As a bonus it also does it at faster apertures.
Sharpness at 50mm to 100mm is great wide open up to f5.6 after which it starts softening a little. At 150mm it is again great wide open and is good up to f8 after which it starts softening a little. At 200mm its really good wide open and keeps getting better till f5.6 where its great, however f8 is also very good showing only minimal sharpness loss. This also applies to long distance shots. At 200mm the 100m plus shot was fantastic at f5.6. In fact its sharper than the 100-300mm at 300m f8 (its peak sharpness) and shows more detail. So if you have both of these lenses don’t automatically assume that the 100-300mm will get better shots at long distance.
As for CA (that green/magenta coloured line on the edge of high contrast portions of the image) its generally very well controlled and not an issue.


PS: There are two versions of this lens, this is the older Non SWD revision.
Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5Olympus 50-200mm f2.8-3.5