Jump to content


Photo

Balancing tungsten to sodum vapor


  • Please log in to reply
7 replies to this topic

#1 Matt Irwin

Matt Irwin
  • Basic Members
  • PipPipPipPip
  • 389 posts
  • Cinematographer
  • Los Angeles

Posted 29 March 2006 - 03:47 PM

I've got a low budget night shoot coming up that takes place on a pier lined with sodium vapor street lamps. The lamps actually provide a lot of illumination and we want to incorporate them into the shots, so I need to find a gel recipe to balance some tungsten and 3200k flo units to the vapor lights.

Of course the color temp varies among sodium lights; I'm looking for a recipe(s) that will get me in the ball park so I can do some tests.
Any favorites? (We're shooting on an HVX200 in 720)

Thanks,
  • 0

#2 Stuart Brereton

Stuart Brereton
  • Basic Members
  • PipPipPipPip
  • 3057 posts
  • Cinematographer
  • Los Angeles

Posted 29 March 2006 - 04:25 PM

Matt,

There is a discussion of gel packs to match Sodium Vapor towards the end of this thread:

click here
  • 0

#3 Matt Irwin

Matt Irwin
  • Basic Members
  • PipPipPipPip
  • 389 posts
  • Cinematographer
  • Los Angeles

Posted 29 March 2006 - 05:46 PM

Matt,

There is a discussion of gel packs to match Sodium Vapor towards the end of this thread:

click here


Lee Apricot 147 and Rosco Cal Colour Yellow 15, huh? Cool, I'll give it a try. Thanks!
  • 0

#4 Stuart Brereton

Stuart Brereton
  • Basic Members
  • PipPipPipPip
  • 3057 posts
  • Cinematographer
  • Los Angeles

Posted 30 March 2006 - 12:44 PM

You should have a look at Michael Nashs' suggestion too. It's a very good match.
  • 0

#5 Robert Hughes

Robert Hughes
  • Basic Members
  • PipPipPipPip
  • 873 posts
  • Sound Department
  • Minneapolis

Posted 31 March 2006 - 12:31 PM

But, at the risk of restating the obvious, it is practically impossible to balance sodium vapor light to anything, as the light is a discontinuous spectrum; orange and deep violet only. How can the color temp of sodium light vary between units? Also, from my experience these lights have about as much color as sepia toned b&w. So you probably don't want to match your tungsten and kinoflos to them if you want any color in your foreground.
  • 0

#6 Matt Irwin

Matt Irwin
  • Basic Members
  • PipPipPipPip
  • 389 posts
  • Cinematographer
  • Los Angeles

Posted 31 March 2006 - 01:58 PM

But, at the risk of restating the obvious, it is practically impossible to balance sodium vapor light to anything, as the light is a discontinuous spectrum; orange and deep violet only. How can the color temp of sodium light vary between units? Also, from my experience these lights have about as much color as sepia toned b&w. So you probably don't want to match your tungsten and kinoflos to them if you want any color in your foreground.

You are correct. I don't plan on white balanceing to the sodium vapors-- I'll be at 3200k. I need to gel certain lights so I can put/enhance those colors where I need them. There will probably be pure 3200 key as well as some motivated blue somewhere to compete with the heavy orange.
  • 0

#7 Robert Hughes

Robert Hughes
  • Basic Members
  • PipPipPipPip
  • 873 posts
  • Sound Department
  • Minneapolis

Posted 31 March 2006 - 09:45 PM

Ungelled automobile headlights may be appropriate. Let them go slightly yellow and don't attempt to balance to the sodium lights.

Edited by Robert Hughes, 31 March 2006 - 09:46 PM.

  • 0

#8 Stuart Brereton

Stuart Brereton
  • Basic Members
  • PipPipPipPip
  • 3057 posts
  • Cinematographer
  • Los Angeles

Posted 01 April 2006 - 04:36 AM

Matts' original query was that he needed to balance some tungsten units to some sodium vapor ones which were actually in his shot, hence the need to find a gel pack that matched. Although Sodium has a discontinuous spectrum, it is possible to achieve a very close visual match with some the the combinations that have been suggested.
  • 0


Metropolis Post

CineTape

Abel Cine

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

Glidecam

Aerial Filmworks

The Slider

Opal

CineLab

Wooden Camera

Gamma Ray Digital Inc

Visual Products

Paralinx LLC

Rig Wheels Passport

FJS International, LLC

Willys Widgets

rebotnix Technologies

Technodolly

Ritter Battery

Tai Audio

rebotnix Technologies

Glidecam

The Slider

Paralinx LLC

Gamma Ray Digital Inc

Media Blackout - Custom Cables and AKS

Opal

CineTape

FJS International, LLC

Visual Products

Aerial Filmworks

Ritter Battery

Technodolly

Broadcast Solutions Inc

Metropolis Post

Tai Audio

CineLab

Abel Cine

Willys Widgets

Wooden Camera

Rig Wheels Passport