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View Full Version : Skew reduction fix, yet?



Kenn Christenson
03-26-2009, 09:37 AM
Any word from Panasonic about a skew reduction fix, yet? I'm ready to plunk my money down, as soon as I hear the word.

David Saraceno
03-26-2009, 10:45 AM
In looking at the threads here, Jan or Barry indicated that the engineers are aware of a pronounced skew in 1080/24p.

And that they were looking at it.

As to a fix?

I don't see any information about that at all.

Might be wrong.

Barry_Green
03-26-2009, 10:59 AM
I haven't heard of any updates yet.

lyonfilms
03-29-2009, 01:09 PM
Barry -

I believe I read a fairly straight forward technical explanation you put together regarding what you understood RED and SONY did with their respective CMOS chips to help reduce the skew (especially in terms of the RED).

Would you mind repeating what that process is? I can't find where I read that before.

Cheers.

David Saraceno
03-31-2009, 09:53 AM
One question other than whether Panasonic intends to address the skew is whether any fix or update will address it for both 1080 and 720.

Barry_Green
03-31-2009, 01:58 PM
Red has said they've gone in and reduced the read-reset time substantially, which shortens the time it takes the chip to scan the full frame. I don't know what Sony is doing. Thomson, with the Infinity, runs at double frame rate, so internally the sensor is running at 120fps when it's recording 60fps.

alexdias
03-31-2009, 03:04 PM
So, there're fixes and improvements out there.
I've already mentioned here that working with a RED One a few months ago the rolling shutter issues were noticeably improved from the early models of that camera. On that occasion, I had to force a situation to see some skew, and doing so it was undoubtedly there.
So It's an improvement not a "fix", but it's feasible.

David Saraceno
03-31-2009, 04:25 PM
Is this all a firmware update, or reengineering?

puredrifting
03-31-2009, 05:46 PM
One question other than whether Panasonic intends to address the skew is whether any fix or update will address it for both 1080 and 720.

David:

Just so you know, I shot with the HPX300 on a big shoot for LA Metro all last week and the skewing in 720 is minimal, much less than the EX1 shows. In 1080, it is much more noticeable.

Not sure at all as to how the 300 internally derives it's 720 signal, is it just a downresolution version of a native 1080 signal? If so, how come 1080 has so much more skewing? Ah, too much of the engineering mind needed for all of this. All I can say is that in 720, the camera is great. In 1080, good but with caution as to what you are shooting, how long the lens is and movement of subject and camera.

Dan

alexdias
03-31-2009, 05:50 PM
Is this all a firmware update, or reengineering?

With RED One as far as I know has always been done with firmwares.

David Saraceno
03-31-2009, 06:32 PM
Thanks Dan:

I have your PM on the same subject. I always appreciate your assistance.

It may be prudent to see how this all unfolds.

I know Panasonic stepped to the plate with the wobble with the 170s.

I am hopeful that a firmware upgrade is forthcoming to attenuate the skew at both resolutions if they are different.