a unique telephoto zoom lens for Olympus Four Thirds dSLR system offering field of view of a 100-400mm zoom lens combined with weatherproofing, wide aperture and relatively compact and light size for such a range, plus one gets close focus capability not available on comparable Canon or Nikon lenses.
this is one of my favorite lenses
unfortunately it is not designed for contrast-detect AF thus when used on current Micro Four Thirds system cameras, AF in bright light takes 3-6secs. Olympus has addressed AF speed with the Olympus OM-D E-M1 having phase detection AF.
most users would now be better off buying the smaller, lighter, CDAF-optimized Olympus mZD 40-150mm f/2.8 pro lens although you don't get as much telephoto reach and there is no 2x teleconverter for this new lens as yet
non-SWD original version
Olympus macro flashes can be attached via the bayonet method
nice lens but some vignetting wide open; good bokeh; ~$A1400;
“With the lens attached to an Olympus E-5 camera body, focusing is extremely fast and, thanks to the Supersonic Wave Drive auto-focus motor built into the lens, essentially silent too”
“Lateral chromatic aberrations, typically seen as coloured fringes along contrasty edges, are a non-issue with this lens. A truly exceptional performance!”
“some light fall off especially at 100mm”
“Build quality is outstanding, with a solid construction and superb fit and finish. It's also very good in the optical department, showing pretty consistent sharpness results across most of its aperture range”
“only slight distortions throughout the range. It shows a bit of barrel distortion at 50mm changing to slight pincushion distortions from 100mm onwards”
“vignetting of ~0.8EV in the 100-200mm range which can be visible in critical scenes. Stopping down by 1 f-stop solves the problem. At 50mm vignetting is a non issue”
“produced very convincing resolution results in the MTF lab. At 50mm the quality is next to perfect across the frame. At 100m the center performance remains excellent from f/2.8 all the way up to f/8 whereas the border quality decreases slightly. It's impressive that the Zuiko is capable of keeping the center performance on very high levels at 150mm and 200mm. The borders suffer a bit more but stay on a very good rating even wide open”
“Lateral chromatic aberrations (color shadows at hard contrast transitions) are very well controlled - less than 1px”
“bokeh is variable depending upon the background but in critical backgrounds can get a touch nervous” - “but this occurs with most other comparable zoom lenses as well”