Let's talk a little about the lens. This is the first zoom with a constant aperture of f2.8 throughout the zoom range that's been brought to market. The next will be the 35-100 f2.8. If the 35-100 is the same quality as the 12-35 then it's going to be a winner. The 12-35 is well built, focuses fast on the G5 and produces first rate images. I've seen some negative comments on the net regarding this lens, but most of those were using this lens of an Olympus body. As I've stated before, I tend to use Panasonic lenses on Panasonic bodies and the same goes for Olympus. I think that's the only way for you to get the ultimate image quality that one seeks.