GH4; image flicker when zooming with 12-35 lens.
 

My GH4 came with the Panasonic 12-35 mm f2.8 lens. When I zoom with this lens I see a flickering on the finder screen that is recorded. Without zooming the image is flicker free.

If I use an 18-35 Sigma there is no flicker on either the screen or the recording? My guess is that the Panasonic lens has a problem.

Is there anything I can try before returning it to my supplier?

Re: GH4; image flicker when zooming with 12-35 lens.
 

It looks like this is a typical behaviour of this lens, see also here:

Re: GH4; image flicker when zooming with 12-35 lens.
 

Thanks Noa,

That is the flicker shown by my lens, however I would say that it worse with my lens.

I meant to place this thread on the Panasonic Lumix GF/GH Series site but something has gone awry. I am now trying again on that site.