Jump to content


Photo

CTO measure to match both lights?


  • Please log in to reply
2 replies to this topic

#1 Tiago Pimentel

Tiago Pimentel
  • Basic Members
  • PipPip
  • 62 posts
  • Director
  • Lisbon

Posted 01 September 2017 - 03:41 PM

Hi guys,

 

I have a question. I shot the first part of a night exterior scene yesterday with a dedollght LED kit to light the actors (the street is illuminated by the street lamps). I dimmed the dedolights to 2800k to match as close as I could with the street lamps. Next week we're shooting the rest of the scene but I won't be able to take the same kit. The only light available are two Rotolights LED bicolor. But these lights will only go to 3150k. 

 

I wanted to match both lightings. Even if I WB the camera to 3150, the street illumination will change. So my best option will be to try to transform the 3150k to 2800k, using CTOs. Any idea on the measure I need? Maybe 1/4 is enough?

 

Thanks!


  • 0

#2 Stuart Brereton

Stuart Brereton
  • Basic Members
  • PipPipPipPip
  • 3072 posts
  • Cinematographer
  • Los Angeles

Posted 01 September 2017 - 06:22 PM

According to the Lee Filters Mired Calc, that's a 40 Mired Shift. 1/8 CTO or CTS should be fine.


  • 0

#3 Tiago Pimentel

Tiago Pimentel
  • Basic Members
  • PipPip
  • 62 posts
  • Director
  • Lisbon

Posted 01 September 2017 - 06:54 PM

Thanks stuart! I'll take 1/8 cto and place in front of the Rotolight.

Btw, I've never worked with this Rotolight leds which has all of those of tiny led bulbs that need to be diffused. Maybe using diffusion paper directly on the light? Will that be enough to properly diffuse it?
  • 0


rebotnix Technologies

Rig Wheels Passport

Glidecam

CineTape

Metropolis Post

Tai Audio

Visual Products

Willys Widgets

Abel Cine

Media Blackout - Custom Cables and AKS

Wooden Camera

CineLab

Aerial Filmworks

Technodolly

The Slider

Opal

Broadcast Solutions Inc

Paralinx LLC

Ritter Battery

FJS International, LLC

Gamma Ray Digital Inc

CineTape

Gamma Ray Digital Inc

CineLab

Glidecam

Visual Products

Aerial Filmworks

Metropolis Post

FJS International, LLC

Rig Wheels Passport

rebotnix Technologies

Wooden Camera

Opal

Willys Widgets

Tai Audio

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

Ritter Battery

Technodolly

Paralinx LLC

The Slider

Abel Cine