Press Release: Panasonic Announces 4K Mirrorless DMC-GH4

[Chris Hurd]

Originally Posted by David Heath

Burn in may be a big problem if it happens on a proper display device such as a plasma TV - but so what in a camera monitor?

Originally Posted by Les Wilson

If there's burn in, the LCD is not fit for purpose. Shame on Panasonic. Stills camera designers at play.

Les: That's a mighty big if. To quote the incomparable George C. Scott from Kubrick's Dr. Strangelove, "I'd like to hold off judgement on a thing like that until all the facts are in."

David: It *was* a big problem, but that's from a very long time ago. One of the main reasons why I bought the Panasonic PZ850 (mentioned earlier in this thread) was due to the fact that the issue of burn-in on a plasma set by the 2008 generation was practically non-existent. I didn't have to bother with a break-in period, and now, years later, there's never been the slightest hint of it.

[Les Wilson]

My post was too concise. This issue was discussed elsewhere early last year and if memory serves, someone claimed a Panasonic marketing person responded to the criticism of the 10 second displays with the line that it was to prevent burn in.

If burn in is the problem, then to David heath's point they chose a part that isn't fit for purpose. It's not a TV, it's a camera.

If burn in isn't an issue, then why not fix it in the next firmware release (there's been two).

If they don't fix the single most complained about flaw (a seemingly incredibly simple thing to do) then (to my point) they really don't care about customer satisfaction and have a naive implementation for video.

[Les Wilson]

Originally Posted by Glen Vandermolen

Jan Crittenden now works more in Sales, rather than product development, for Panasonic. This may be why you don't hear from her on these forums anymore.

Yes, another bit of evidence the product team was dismantled and the AF100 simply being milked for what it can return on the initial investment.

[Mark Williams]

Based on the GH4K's features I wouldn't doubt at all if Jan Crittenden had some input to its development.

[Peer Landa]

Originally Posted by Joe Ogiba

I think 4K on the 1D C is a 1.3x crop of the full frame sensor.

Yes, you are correct.

-- peer

[Ken Ross]

OLEDs have been used by Sony in some of their cameras for the last couple of years. They don't time out and they don't suffer from burn-in. It would seem odd to me that Panasonic is doing that out of fear of burn-in.

[Ger Griffin]

Originally Posted by Joe Ogiba

I think 4K on the 1D C is a 1.3x crop of the full frame sensor.

Good info. Didn't realise that. We have a way to go yet but getting closer to >4k raw video from a full frame sensor. That'll turn the event industry on its head for sure.

[David Heath]

Originally Posted by Les Wilson

If burn in is the problem, then to David heath's point they chose a part that isn't fit for purpose. It's not a TV, it's a camera.

The point I was trying to make is that whether or not there's burn in (and I'm quite happy to go along with Chris that it's largely something of the past) then what's the problem in *a camera viewfinder*? OK, if it did burn in a bit, so what? Better that than having a negative effect on ability.

Which leads towards the conclusion that the issue has nothing to do with burn in. A] It's not likely in the first place. B] So what if it did?

[Mark Williams]

Interesting Panasonic GH4 presentation https://www.dropbox.com/s/cn0rev9fy5...esentation.pdf

[Phil Lee]

Hi Mark

Think the link didn't copy and paste correctly so posted it again here: https://www.dropbox.com/s/cn0rev9fy5...esentation.pdf

Interesting PDF, I think the only thing though it did confirm for me was the sensor uses pixel binning rather than line skipping when recording video.

Regards

Phil

[Mark Williams]

Originally Posted by Mark Williams

Interesting Panasonic GH4 presentation https://www.dropbox.com/s/cn0rev9fy5...esentation.pdf

Link has now been taken down. Sorry that I didn't save the .pdf.

[Chris Hurd]

Wish I could train you guys into uploading .PDF attachments to this site.

Call me old fashioned, I guess, but whenever I find something interesting via DropBox (or similar), I always right-click and "save as," and from that point it's just a matter of clicking "manage attachments" in the post reply box here on the forum.

[Mark Williams]

Here is another link to it http://www.personal-view.com/logo/GH4_Presentation.pdf

[Chris Hurd]

Thanks for uploading it, Mark!

[Jack Zhang]

Two important points from this slideshow:

1. The battery life is worse on the GH4 than the GH3. (540 on the GH3 vs 500 on the GH4)

and

2. The AC adapter notes a 4K/60p mode for the interface module.

Could it be that this little thing can actually pull off 4K/60p via 4x3G-SDI?