I used a Carl Zeiss Jena 35mm F2.4 which is a standard lens but has a good close minimum focus distance of 0.2 metres which is almost 1:2 macro. Of course, you can get closer with dedicated macro lenses.
Now, the GH2's 1:1 crop feature dramatically increases the macro and telephoto capabilities of a lens, turning an standard macro lens into a super duper one, and a standard 85mm F1.4 portrait lens into a 400mm F1.4
Great for macro and low light telephoto, and saves you having to swap lenses or even buy a macro and telephoto lens in the first place to shoot video.
A major killer feature.
FOR AN IN DEPTH REVIEW OF THE GH2 READ EOSHD.COM