Here is a simple video demonstrating the field of view of these lenses all on a fixed GH1 at f/8, taken in RAW, converted in ACR to jpeg:
Olympus 9-18mm at 9mm
Panasonic 20mm
Panasonic/Leica 45mm
Panasonic 45-200mm at 200mm
It's also interesting to see 5 mft lenses (including the Panasonic...
Here's a brief 9x timelapse video shot entirely with the GH1 in Haleakala crater on the island of Maui showing swirling clouds pushing into the dry crater interior.
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14-45mm lens, shot in FHD, vibrant mode, compressed in Sony Vegas Pro 9d