GH1 1st test with Sigma 28mm 1:1.8 + Nikon 50mm 1:1.4

First test with fast Nikon lens.
No CC
Shutter : 100
720P 50fps to 25fps with Premiere CS 4.1 (native editing)
Duration : 4mn

It's great working with fast lenses for the DOF, but hard to focus and hard to shoot with the 50mm (100mm on GH1). It seems I have more light with the 28mm 1.8 than the 50mm 1.4.... Can someone explain this to me ?

Music : Tori Amos "Enjoy the silence"

j vimeo.com/6481427

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