Hy mates I need some help, I got some very strange issue in my GH2

I got a slight flickering oscillation when filming still shooting on tripod ! ( as you can see in the video below) the flickering is not constant , sometimes slower sometimes faster

I did a video in ETC mode , to make more evident the bug , which is also present in normal mode , it shooted on a strong tripod , no wind (or earthquake LOL)

this happens to me only with pana zoom lenses I own ( 14-45mm OIS and 12-35mm OIS) not at all with manual lenses

I tried OIS on/off , AF manual , C and S , different film mode , shutter , aperture , I tried to change all the settings in the menu , nothing is changed

I don't think is about hack coz I tried to install a few , the only thing I didn't try is to install original stock firmware

This issue still also in photographic mode , still already in preview mode ( I mean also when you're not in recording mode)

When you make little movement with OIS "on" shaking stopping , then when you back to fixed shot after a few seconds it comeback again , momentanely shaking stopped happens also during manual focusing on MF mode

with 14-45mm it is happens only when I point the camera at the top (check out video below).

with 12-35mm almost always also in horizontal position ( I filmed 10min still shot , the shaking stopped after 3 minutes )

I dunno it sounds like a OIS or AF issues , but does not explain why he does it with both panasonic lenses with same bug but with a different behavior one from another , so I'm afraid that is about GH2 body .

I do not remember if this bug has always done , because I have not paid attention.

it's really hard for me to figure it out and explain well to you ,also cause I'm not speaking English very well.

if any of You ll'be so kind to do same experiments to see if it happens,or have any suggestion It would be extremely grateful

thanks for your time

password: flicker