Hi.

Just registered here to share my experience. Got my lense in GH3A kit 14.03.2013 in Helsinki. Serial number starts with XT3AD..... Did video test on tripod 45, 15, 0 degrees down, 35mm and 12mm focal length in next modes: AVCHD(1080, 50i) and AVCHD(1080, 50p) with OIS On and Off. Same time I bought X G PZ 45-175 lense and did same tests for 45mm (45 degrees) and 175mm (45, 15, 0 degrees) OIS On and Off. All was shot with ISO800, Continuos AF ON, Video Exposure mode P. Then copied the video on PC and played back with Zoom player ffdshow video encoder. Deinterlacing switched on for interlaced clips only. There is easy to zoom in by pressing right-side +/- buttons (like in Photoshop). So I checked 100% and up to 400%.

Here are my subjective results:

• At angles 15 and 0 both lenses are rock stable with or without IOS. I cannot see any movement at 400%.
• The 12-35 lense at angle 45 has no jitter at 12mm but at 35mm it does have a circular jitter around one pixel when 300% zoom. In 100% nobody would notice it. OIS On or Off does not matter. At 50i it seems less noticable than 50p. Even 2 of my clips had no jitter in 50i but I guess this just proves the jitter is not always there and not related to the mode.
• The 45-175 lense at angle 45 has no jitter with OIS off. When OIS is On it does have about 1 pixel jitter at 45 and 175 but it is not circullar. It is side to side and has faster frequency at 175.

Also I did a long exposure still shots with 12-35 at 35mm, 45 degrees, 6 sec. I do think the results are as sharp as with same scene and fast shutter speed. Still it appears that with electronic shutter the image is sharper. I did not make many tests with stills because the result satisfied me and I did them before video tests because it was worried me more. I was expecting to find there a blurred result and was happy it was not there. I'm a bit confused why long exposure shots are sharp. Maybe it proves that in video mode there is going something that could be fixed with firmware. But again, I did just 4 shots with shutter speeds 1/25, 4, 4 (mechanical) and 1/50 (electronical). Not a huge statistics.

I was really worried while ordering the camera. At the moment my feeling is that the issue is there but it is not real life issue for my lense copy. But I believe that certain copies may have the jitter more evident. It is a shame if Panasonic would insist that the lense works properly for those users.

I do not publish my clips but if anybody needs them, then tell please which mode, angle etc.. you would like to see.

wow, panasonic b trippin. I will be getting my lens sometime next week and will post my results then. hope you are able to get a working replacement.

has anyone tried this with stills? seems that any longer exposure photo should come out pretty shit with this issue...

@Zaz good call.

I have this lens now for less than a week, never checked the jitter issue. Just took photos. It's dam fast on AF and with OIS, it's just sick. I was originally planning on an Oly 17mm f1.8, but might explore that option a bit later. For now, this lens does what I need.

anyone know if tox's lens is a later serial#?? i know that a lot of XT2.. #'s have shown this problem..

i just bought this lens, and i did the jitter test. ON GH3, 12-35mm @35mm , IS off, on tripod , tilted down 45 degress.

No problem at all!

@Kellar42 You can post something

Anyone heard anything back from Panasonic at this point?

From Amin:

"I've forwarded a bunch of emails from users all over the world to my Panasonic US contact who has either replied directly to the user or forwarded their email to the corresponding Panasonic contact in their specific country. At this point, he tells me that they don't need me to forward any more emails. They have enough information to go on, including having the lens from affected user(s) in hand to analyze. So please no more emails to me about this issue. I will update this thread and at Mu-43 if/when I have more info, which hopefully will be soon. John, if you wouldn't mind, please copy this message to the other sites so people know that I don't need to get more emails about this. Thanks in advance."

Thanks Amin, I have already been contacted by a Panasonic engineer from US thanks to you! Since I live in Tokyo and my lens is with Panasonic Japan he asked me a few questions and mentioned that he will get in touch with his peers here in Japan.

Great work, thanks again. Will post any news I have of course. By the way I haven't been contacted by Panasonic Japan yet.

@johnmw Is this for any region of the world?

I've already sent in my lens to the service center in Texas. I'll update the thread when I hear something.