1/42 & lower shutter to reduce judder

J

John Trent

Well-known member
I've heard that some use 1/42 or even 1/36 shutter speeds on the DVX to reduce judder. Since the HVX is HD and has even sharper edges (said to be the cause of videos judder, that is unlike film) I was wondering if any HVX users are also using slower shutter speeds and what they were.

I know 1/48 (180 degree shutter) is the standard but I've read even Varicam operators are told they might want to shoot with a 200 (about 1/42) degree shutter to smooth movement.

If this is what some are doing, it's another advantage of the HVX over HDV cams, because they're unable to do this.

Thank you.
 
Shutter speed and the DVX. I recently had to inter-cut (although for only 4 shots) some DVX pick-up footage with S16mm. Shooting 24p, I bumped the shutter up to 1/80th of a second, and it matched super super well with the S16mm footage, better than 1/50 or slower.

With the shutter speed, my scene file and crushing blacks in posts, ppl really couldn' t tell some of the shots were video (although they only lasted max 4secs).
 
What about showing each frame twice like they do in the theaters? Is there a way to effectively do this with video? I don't see a lot of judder in film projection in theaters, and asked a projectionist about this and he told me they show each frame twice or even three times before moving on to the next.
 
dailyrushes said:
What about showing each frame twice like they do in the theaters? Is there a way to effectively do this with video? I don't see a lot of judder in film projection in theaters, and asked a projectionist about this and he told me they show each frame twice or even three times before moving on to the next.
Click to expand...

it all depends on the gate of the projector. the way i understand it, it is the gate of the projector, opening and closing, creating a flicker, that creates moment (hence when you sit in a theatre to watch a movie, we spend half the time in the dark, because the gate is moving so fast the human eye cannot tell)
 
The projection technique evens out flicker, but does nothing about judder. There are still 24 distinct frames being shown every second.
 
Barry_Green said:
The projection technique evens out flicker, but does nothing about judder. There are still 24 distinct frames being shown every second.
Click to expand...

true. but we are still in darkness half the time.
 
You must log in or register to reply here.
Back
Top