Some say it doesn't matter...

[Ryan Dean]

Hi All-

You probably have covered this before but....

I've heard from many Red Users that it doesn't matter what your settings are because the camera is always shooting 320ASA @ 5000K.....

Let's say I'm shooting with the camera set to 160ASA @ 4000K.
I bring the r3d in to RA and change the ASA to 320 because I think it looks better (according to the histogram.) My question is this. Would I have gotten the same results if I set the camera to 320ASA to start with? The only reason I bring this up is because I need to know if I gain or lose anything (dynamic range) by messing with the ASA in the first place. I hope I'm making sense.

Thanks!

 

[Jeff Kilgroe]

ISO / ASA is all metadata and when set in camera only pertain to monitoring. You would have got the same image had you set the camera to ISO 320.

...But that doesn't mean you would have kept the same exposure if you were monitoring differently.

With the RED One, ISO/ASA, white balance, color space, gain, etc.. are all metadata and have no effect on the RAW image data as acquired from the sensor.

 

[Steve Sherrick]

Ryan, I definitely recommend you read the exposure thread happening here:
http://reduser.net/forum/showthread.php?t=30800

Macgregor's thread here:
http://reduser.net/forum/showthread.php?t=28705

And test on your own as much as possible. There's a lot that requires seeing the images first hand and how various approaches affect the final images.

 

[Mitchell M]

well it does matter a little because if you shoot and preview to monitor with an ISO 160, you may accidently expose your shots improperly....

 

[Deanan]

You don't gain or lose anything by adjusting the gain.
However, doing so will adjust the monitor outputs so if you are adjusting lens aperture based on the image you're seeing on the monitor, then you will be indirectly affecting the image...

 

[Ryan Dean]

thanks for all the replies thus far.
i did an interesting test.

the first image:
i set the camera to 320.

the second image:
I set the camera to 160 and changed the ISO to 320 in RA.

if the camera is always shooting 320 regardless if you set it in the camera or in RA... why would the histograms be different??

this test had the same lighting conditions and the same stop on the lens.. nothing changed...


any thoughts?

 

[David Mullen ASC]

There may be differences in the Red Alert settings for black level or gamma or something, or some other element of your 160 ASA metadata tracked over even though you opened it up at 320 ASA. Are you saying that you exposed both versions at the same stop, but one was set to 160 ASA in the camera but then you changed it to open as a 320 ASA image in Red Alert?

 

[Ryan Dean]

There may be differences in the Red Alert settings for black level or gamma or something, or some other element of your 160 ASA metadata tracked over even though you opened it up at 320 ASA. Are you saying that you exposed both versions at the same stop, but one was set to 160 ASA in the camera but then you changed it to open as a 320 ASA image in Red Alert?

Hi Sir,

Yes, that's exactly what I'm saying. You make some interesting points. I wonder if there is a way to figure out if indeed Red Alert tracked over some "mysterious" elements.

BTW thank you for all your input.

-ryan

 

[Deanan]

Hi Sir,

Yes, that's exactly what I'm saying. You make some interesting points. I wonder if there is a way to figure out if indeed Red Alert tracked over some "mysterious" elements.

BTW thank you for all your input.

-ryan

Can you output a CSV file from red rushes from both clips and email that to me?

There really isn't anything that can change the recording on the camera side other than shutter speed and framerate. Everything else is metadata.

 

[Dalibor Fencl]

change the ASA

change the ASA

Jesus, this topic was discused here about thousand times.

I offer to RED team: Change the naming from ASA setting to something else, perhaps gain, that is more close to what it does. So the folk will not misunderstand it again and again.

 

[Adrian T.]

I offer to RED team: Change the naming from ASA setting to something else, perhaps gain, that is more close to what it does. So the folk will not misunderstand it again and again.

It's not the naming. It's the menu location!
Sensitivity and Color Temp don't belong in the "Sensor" menu but rather in the "Video" menu. These settings don't modify any sensor property, they're just for preview and meta data.

My 2 cents... :violin:

 

[I Bloom]

It's not the naming. It's the menu location!
Sensitivity and Color Temp don't belong in the "Sensor" menu but rather in the "Video" menu. These settings don't modify any sensor property, they're just for preview and meta data.

My 2 cents... :violin:

I've often had that thought. Also putting all Audio in one menu would be great. As has been said :beatdeadhorse:

But well frankly, all this confusion is how some of us guys get our street rates so...

IBloom

 

[Blair S. Paulsen]

The core problem is trying to graft existing understandings about other image capture devices to the RedOne system.

Red is Red. Learn how it works. Ignore any apparent correlations with other systems based on common vocabulary.

test. test. test.

Cheers -

 

[Birns and Sawyer]

The core problem is trying to graft existing understandings about other image capture devices to the RedOne system.

Red is Red. Learn how it works. Ignore any apparent correlations with other systems based on common vocabulary.

test. test. test.

Cheers -

Well said.