GH2 14-42 Constant Preview SS help pls

Thanks for your replies.

It's good to know this is normal. I noted that somebody else tried this with a 20mm and 140mm lens for me at 15" of a second (on another, less concise thread of mine), and didn't get any freezing of the Histogram and just blurry trails. Which is why I thought it could be an issue with the 14 - 42?

Thanks.