I shot some motorsports this weekend. After shooting in the rain for 10 consecutive hours on Saturday and most of Sunday starting before 7 in the morning, I was getting tired of hauling 5-6 kilograms of gear around under my raincoat, which was just as wet on the inside as on the outside anyway. So when the rain stopped on Sunday afternoon, I dumped the Nikon gear in the car and picked up the GH1 with the Pana 7-14mm and an OM Zuiko 50mm f/2.0 macro. That's around 1 kilogram. To get the same flexibility as with the Nikon gear, I would need to add around 1 kilogram more.
The purpose of the exercise was to see if it is possible to do good pan shots using the EVF of the Panasonic. I tried two different approaches; multiple shots, checking the pan speed as the photos popped up in the viewfinder, and single shots. Both worked, but single shots worked better, partly due to the very responsive shutter release of the camera.
I mostly do four kinds of shots at the races: people, starting grid, head-on telephoto work and pans. Below are examples of 1, 2 and 4. I'm buying a GH2 next week. Some of my Nikon gear is up for sale.
Another approach for pan shots would be an external optical viewfinder. I'll try that next time around. Please excuse the colours. The Panasonic jpegs suck and the photos are edited on an uncalibrated monitor.
GH1 with OM Zuiko 50mm f/2.0 Macro
GH1 with Pana 7-14mm @ 9mm and f/5.6
GH1 with OM Zuiko 50mm f/2.0 Macro @ 1/80s