I've got a B4 lens with a M43 adapter and a second B4 adapter for sale.

The lens is a Canon J18x9B4 IRS with builtin doubler,
So gives you full coverage and a 18-324 zoom
and roughly a f/2.8 (or f/1.7 9-162 in GH2 ETC mode).
The lens has a flat part at the bottom where I've added a 1/4-20 bolt.
So you can directly attach it to a tripod plate
(Manfrotto RC2 plate in the picture is an example and is NOT included).
I'm also including a matching black B4 to M43 adapter.
The lens fits correctly on a GH2/GF2..etc and works well and does have some surface wear and tear.
Asking $500 for the Lens with Adapter

The second adapter is the same one sold on eBay
for $300+ with a solid tripod mount and smooth collier.
Asking $200

Prices include shipping inside the USA. I am willing to ship outside the USA with buyer paying
all shipping/fees and taking full responsibility for loss/damage.

Open to offers. Will remove this when they are gone.
Thanks, Patrick