Final lens question
I've looked up the compatibility chart and it tells me the Sigma APO 70-200mm F2.8 II DG MACRO HSM.
However, on B&H I have choice of this lens for Nikon, Canon, Pentax, Sony or Sigma with quite a big price range.
Which do I go for ?

if the GH2 would be my only camera for this lens, i'd compare the prices for the lens and micro four thirds adapters for the different connections (Nikon, Canon, Pentax, Sony...) and choose the best price...

I believe the one on the compatibility chart has a 4/3 mount.

Gordon

Chris, the lens you want is the Olympus mount, that is what the chart you refer to doesn't make clear.

Your lens may be difficult to find and discontinued. I have the Sigma 18-50 F/2.8 Olympus mount, and it is absolutely impossible to find anywhere, I was very lucky to have found mine. I have since not seen another anywhere, except I did see one in Australia, and it was damaged..

Your lens may be equally difficult to find. Start looking on Ebay, craigslist, and amazon., good luck.

Thanks Jeff,
Yes, from the compatability chart it says that a 70-200 with a mount is compatible, yet B&H told me that none of the ones they have can be used. However they don't have an Olympus mount on the 4 or 5 they have for sale, so I'll keep an eye for it on ebay, etc. With F2.8 it really makes it a great long lens to have. I think in the meantime I'll settle on the Panny 100-300.
Cheers