PAL in a 60hrz world-Frame rate question at DVinfo.net

Paul Zwicker · July 17th, 2009, 09:03 AM

Sorry if this is out there already.
I am just double checking my information.
I am shooting PAL on my EX3 tomorrow in the United States for a British production company. Will I experience banding if I have to shoot under fluorescent lights due to the CMOS chips?
Perhaps that is a poorly phrased question. What shutter speed would I need? I believe since we are in 60Hz land, I need to set shutter at 60Hz.

I am testing today in 1080/50i and 1080/25p.
With the flicker reducer on at 60//Hz.

In 1080/501, the shutter speed would set at 60-correct?

In 1080/25p, shutter setting should be either 1/33, 1/50 or 1/60?

I see no banding at 1080/25p - 60Hz with a fluorescent light.

Thoughts?

Thanks,

Paul

Les Nagy · July 17th, 2009, 12:07 PM

I am not sure this will help you as I faced the opposite problem.
http://www.dvinfo.net/conf/sony-xdca...highlight=50hz

But perhaps it can give you some insight on settings to try.

Daniel Epstein · July 17th, 2009, 01:55 PM

Paul,
You should set the shutter to be compatible with the electrical frequency of country you are shooting in. Pal in the US should be set to 60hz if you are getting flicker. If you are shooting NTSC in Europe then you want to set the shutter to 50 or some multiple. Not all sources cause flicker but you may not know it till you get it so I tend to set it up before the shoot so I would have to turn it off if I wanted to change the shutter on location

Paul Zwicker · July 17th, 2009, 02:48 PM

I was pretty sure 60Hz was correct-just having one of those Duh! days.

Thanks guys.

Paul

Les Nagy · July 17th, 2009, 07:23 PM

If you read my post that I linked you will see that it doesn't always work that way.

Paul Zwicker · July 18th, 2009, 04:58 AM

I did read the posts you linked to. Testing yesterday at 60Hz, 1080/25p and 50i showed no flicker or rolling shutter issues. I also had the flicker reduction feature turned ON.

Interesting how you found different settings working opposite of what you would expect.

Thanks again,

Paul

Piotr Wozniacki · July 18th, 2009, 05:40 AM

Quote:

Originally Posted by Paul Zwicker

I did read the posts you linked to. Testing yesterday at 60Hz, 1080/25p and 50i showed no flicker or rolling shutter issues. I also had the flicker reduction feature turned ON.

Interesting how you found different settings working opposite of what you would expect.

Thanks again,

Paul

Per analogy, shooting "NTSC-area" framerates / shutter speeds (e.g. 24p at 1/48th, or 60i at 1/30th or 1/60th) in a 50 Hz country, should require setting the flicker reduction ON at 50 Hz. Sounds logical, but as has been mentioned in the other thread, 60 Hz was used instead...

I guess I need to take a closer look at it, as the ability to shoot 24p (instead of 25p) here in Poland would be a very nice option for universal BD delivery.

July 17th, 2009, 09:03 AM	#1
Paul Zwicker New Boot Join Date: Apr 2008 Location: Madison, WI Posts: 16	PAL in a 60hrz world-Frame rate question Sorry if this is out there already. I am just double checking my information. I am shooting PAL on my EX3 tomorrow in the United States for a British production company. Will I experience banding if I have to shoot under fluorescent lights due to the CMOS chips? Perhaps that is a poorly phrased question. What shutter speed would I need? I believe since we are in 60Hz land, I need to set shutter at 60Hz. I am testing today in 1080/50i and 1080/25p. With the flicker reducer on at 60//Hz. In 1080/501, the shutter speed would set at 60-correct? In 1080/25p, shutter setting should be either 1/33, 1/50 or 1/60? I see no banding at 1080/25p - 60Hz with a fluorescent light. Thoughts? Thanks, Paul

July 17th, 2009, 02:48 PM	#4
Paul Zwicker New Boot Join Date: Apr 2008 Location: Madison, WI Posts: 16	Thanks Daniel I was pretty sure 60Hz was correct-just having one of those Duh! days. Thanks guys. Paul

July 18th, 2009, 04:58 AM	#6
Paul Zwicker New Boot Join Date: Apr 2008 Location: Madison, WI Posts: 16	Thanks Les I did read the posts you linked to. Testing yesterday at 60Hz, 1080/25p and 50i showed no flicker or rolling shutter issues. I also had the flicker reduction feature turned ON. Interesting how you found different settings working opposite of what you would expect. Thanks again, Paul

July 17th, 2009, 12:07 PM	#2
Les Nagy Major Player Join Date: May 2006 Location: A Canadian in Canada, and sometimes Chile Posts: 265	I am not sure this will help you as I faced the opposite problem. http://www.dvinfo.net/conf/sony-xdca...highlight=50hz But perhaps it can give you some insight on settings to try.

July 17th, 2009, 01:55 PM	#3
Daniel Epstein Trustee Join Date: Jan 2006 Location: New York, NY Posts: 1,267	Paul, You should set the shutter to be compatible with the electrical frequency of country you are shooting in. Pal in the US should be set to 60hz if you are getting flicker. If you are shooting NTSC in Europe then you want to set the shutter to 50 or some multiple. Not all sources cause flicker but you may not know it till you get it so I tend to set it up before the shoot so I would have to turn it off if I wanted to change the shutter on location

July 17th, 2009, 07:23 PM	#5
Les Nagy Major Player Join Date: May 2006 Location: A Canadian in Canada, and sometimes Chile Posts: 265	If you read my post that I linked you will see that it doesn't always work that way.