Stuttering image while Panning

[Dave Blackham]

I havent read the whole thread but I hope some one has mentioned pan speeds are documented int he ASC manual. Its not a new problem.

The other concern I have I think the Tessive system is very interesting and helps a great deal. My impression has been that Global shutter motion artifacts appear worse than rolling shutter artifacts. What do you guys think ?

 

[Tony Davis]

A retrofit could be a gadget like the tessive filter which is an active filter to be mounted in front of the lens, creating a curve like variable exposure by using electronically controlled intensity filters (most likely polarizers) synced to the phase of the electronic shutter. This could of course also be integrated into a future camera...

Great explanation. That's precisely what the Tessive Time Filter does (the fading in and out) but with a different, more precise function than a sine wave.

Thanks,

Tony
www.tessive.com

 

[Björn Benckert]

I think there are people here with a slight misconception of the "too fast" issue.
My understanding of the panavision/ASC panning speed charts goes like this:
Slow pans under the stated threshold are good.
Faster pans show the stuttering effect.
But there's another threshold, approaching whip pans, where motion blur takes over and there's no visible stutter again (at least when using standard 180º shutter).

So the problem is not the whip pans, it's those in between, neither slow nor fast enough.

To be clear this is general 24p knowledge, I'm not discussing whether the RED threshold is lower than usual or worse than other cameras. I suspect this is more of a display issue, but it's something that should be throughly investigated.

BTW thanks for the BBC whitepaper.

You are very right. The strobe feel also grows with the size of your screen and the level of detail in your short. RED has high detail and when shooting 24p you also have low frame rate. higher framerate on playback would help te problem but that looks like old uggly video so we do not want that. So solution is to pan fast or very slow, especially when going to the bigger screens. I been sitting doing post work for feature shots and all looks good on the flame screen then after printout it looks unsuable in the cinema. The same rule apply to end credits. From cinema they need to crawl really slow for tv they can move faster. For big tv's not so fast. etc.

There is a trick to add motion blur to the pan but there is this midrange where your eye then only see blured image wich is not likable at all.

just my 5 cents... from 15 years infront of the flame screen...

 

[RivaiC]

I havent read the whole thread but I hope some one has mentioned pan speeds are documented int he ASC manual. Its not a new problem.

The other concern I have I think the Tessive system is very interesting and helps a great deal. My impression has been that Global shutter motion artifacts appear worse than rolling shutter artifacts. What do you guys think ?

Well Dave, nobody deny 24P will strobe on fast panning even on film...but thats not the issue.

BUT, please go and watch Final Harry Potter and see if you can spot one stuttering shot in the movie....go figure

Rivai

 

[RivaiC]

Great explanation. That's precisely what the Tessive Time Filter does (the fading in and out) but with a different, more precise function than a sine wave.

Thanks,

Tony
www.tessive.com

Thanks Tony for chiming in ! Looking forward to observe the bluray footage in more details !

Rivai