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noise in grading prorez444 in base ight


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#1 Ram Shani

Ram Shani
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Posted 12 May 2014 - 01:37 PM

hi

i am working on feature film which was shoot with alexa 2k prorez 444 log-c

 

we are working in a pro post house with base light and 2k projector

 

the files from the alexa are very very noise spacialy the red channel!!

 

it's in day ext. and day int. scene

 

same scene it's more present the the other

 

any idea?

 

we are lost!


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#2 Elliot Rudmann

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Posted 30 May 2014 - 11:54 AM

Hi Ram, 

 

Have you looked at the files outside of the color correction suite with a basic LUT (look-up table) on them? Were the images underexposed (leading to extra noise)? Did you shoot with a high-ISO? It's hard to diagnose the issue without seeing examples from the RAW log image and color corrected images. 

 

As a baselight colorist, I have seen Alexa get a little noisy when it's underexposed and brightened up in the color suite, or when the operators lift the ISO sensitivity to shoot in darker areas. 

 

I know this is a late response, but hopefully you've figured out what happened. Good luck!

 

-Elliot


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Gamma Ray Digital Inc

Glidecam

Tai Audio

Paralinx LLC

CineLab

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Wooden Camera

Media Blackout - Custom Cables and AKS

Technodolly

Willys Widgets

Ritter Battery

New Pro Video - New and Used Equipment

FJS International, LLC

Abel Cine

Aerial Filmworks

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