Re: Panasonic 4K DVX200
 

Re: Panasonic 4K DVX200
 

The tentative spec from Juli says 17.2 Mio pixel with 16.05 Mio effective. In a video from Panasonic's Michael Bergeron at Las Vegas NAB he mentioned the size of the sensor is the same as the one in AF100 series, which is 17.8 x 10 mm. This gives a pixel size of 3.2 x 3.2 micrometer.

In other Panasonic documents I found various crop factors for the different record modes.
Full HD: crop factor 2.1875, which gives minimum F of 28mm (transformed to 35mm film).
4K/24: crop factor 2.305, which gives minimum F of 29.5mm.
UHD/30: crop factor 2.39, which gives minimum F 30.6mm.
UHD/60: crop factor 2.929, which gives minimum F 37.2mm.

With these values I have calculated the actually used sensor size for each record mode, based on a pixel size of 3.2 micrometer:
Full HD: used sensor size 16.45x9.25mm, 5140x2890 pixel.
4K/24: used sensor size 15.62x8.23mm, 4881x2572 pixel.
UHD/30: used sensor size 15.05x8.47mm, 4705x2647 pixel.
UHD/60: used sensor size 12.29x6.91mm, 3840x2160 pixel.

These values are calculated based on various information available from Panasonic. They may not be exactly right, however deviations will be marginal. It is only a few weeks now, until we will have clarification, when first DVX200 will be delivered.

Joachim

Re: Panasonic 4K DVX200
 

So that's how they achieve 60p... That's very primitive to have a high pixel density then implementing crop factor using a 1:1 pixel readout in 60p mode, defeats the purpose of a MFT sensor.

I'll skip then. The FS7 reads the full sensor in 60p and if this has such a bad crop factor in 60p (which is what I'm using it for) this is too bleeding edge.

Re: Panasonic 4K DVX200
 

Well.... you get (nearly) the full sensor area in most modes - it's just QFHD 60p with the severe cropping and loss of wide angle ability.

Technically, I think it's wrong to call it "primitive" - it's a step up from previous large sensor designs around the price point (quite a big step up). At least it seems to be fully deBayering what it's reading before rescaling to output resolution. Fundamentally, it shows the limit of read speed off the sensor. Read at 60 frames a second and it can't read the whole sensor each frame - so has to crop significantly.

But at least it's likely to still deBayer/scale properly, so in this mode I wouldn't expect the quality to change appreciably - the performance hit is limited to losing the wide angle for QFHD 60p.

Re: Panasonic 4K DVX200
 

Losing the wide angle matters to me trying to avoid using extra lens attachments when 1080p can get 28mm equivalent without any modifications.

If the difference in crop factor is too great, I'm not a fan.

Re: Panasonic 4K DVX200
 

I shot two features that were theatrically projected, first one with the DVX100 and the second with the HVX200A. Always loved the "panny mojo", the short fall of internal 10bit on the DVX200 takes away from the potential of this camera. It does state that the specs are preliminary on their PDF's, hopefully the final product is different from what's currently being represented online. Nothing really extraordinary so far.

With the the current and upcoming camera offerings, the DVX200 needs to kick it up a few notches.

Re: Panasonic 4K DVX200
 

Re: Panasonic 4K DVX200
 

For that video, make sure you are signed into Vimeo to download the original file to truly evaluate it. The web version is only 720p.

Through some video compression, I'm seeing a TON of dark noise and fixed pattern dark noise for that matter (unless that was H264 playing tricks). This will not be a good low-light camera, I remember historically the HVX200 being quite noisy as well so 1st gen cameras tend to suffer this effect. Any Odyssey captured footage that can delve into this dark noise matter further?

Re: Panasonic 4K DVX200
 

It won't be different.

Re: Panasonic 4K DVX200
 

You're absolutely correct. The section starting at 1:33 on the steel girders looks terrible! Even the leaves on the trees at 1:59 look noisy and soft. At 2:33, in diffused bright daylight, the traffic light pole is very noisy.
I'd hate to see what this camera would do when shooting a theater or wedding event or ENG in low light.

Re: Panasonic 4K DVX200
 

I noticed things in the video that I did not like, I downloaded the original and when I looked at the bitrate stats in VLC for the file I saw that it was encoded using a VERY low bitrate. I don't know why someone would bother to do all that testing then upload a low bitrate file that makes it difficult to determine what the actual quality of the picture is.

Re: Panasonic 4K DVX200
 

I typically upload projects to Vimeo in ProRes LT. I feel weird about uploading a H.264 that Vimeo will re-encode to H.264.

Re: Panasonic 4K DVX200
 

Yeah, this sample was H264 at 20mbps in full Cinema 4K at CBR. The fixed pattern noise was probably the compression playing tricks.

Re: Panasonic 4K DVX200
 

What's your judgement about the colors in this video. It was filmed with a GH4 and a DVX200 on October 15th. Can you tell the difference between the two cameras?