I want to make the following picturew iwth the GH3:

http://www.daveyjphoto.com/tagged/long-exposure

and here the tutorial:

http://www.daveyj.ca/fireworks

2 problems I have with the GH3 there: When I want to make a picture that starts out of focus, it automatoically focusses what I push the button. I have set the menue from "Focus" to "Release" but no difference. OK, I can search for a target elswhere and then refocus or use manual focus mode, so that is possible.

But the 2nd problem is a hard one: When I do a longe time exposure, for example 3 seconds or also "B" Bulb mode, during the taking of the picture, the live viwe is gone. So how can I refocus then? I have to do it blind, trying before hand where it is is focus like written in the tutorial, but he used a 5D Mark II. So he has a mirror. We don't have one and still have no picture.

Does anybody know, how to keep the picture on the screen while taking the picture? Any assistance would be helpful.

(Possible before December 31st, beause ther I would like to try it :-)