As we continue into the spring 2012 I am finding it hard to lug the Mark3 and 400 mm 2.8 out along with me during our outings. The GH2 is proving itself with quick responsive focusing and results. The only drawback is the file size limits to JPG if I go to the digital extension 1200mm but the files are good and clean and can be upsized through Post. If Panasonic would do a firm ware update to allow this to be saved as RAW this would be great.