Sigma 135-400mm f/4.5-5.6
|Focusing distance:||200cm / 78.7in|
|Lens size:||ø83.5mm x 189mm / ø32.9in x 74.4in|
|Weight:||1280g / 45.2oz|
|Construction:||13 elements in 11 groups|
|Accessories:||Detachable Tripod adapter, Hood, Case|
Eddie's take on it
Users report sample variation, back/front focus problems. Pictures at 400mm are pretty soft. It is also slightly soft wide open at all focal lengths, needs to be stopped down.
If you need a long range telephoto, I'd pick up the Olympus 70-300mm instead.
Because the Olympus alternative is so good, not many people bought this for 4/3 and it's hard to find it used.