Jump to content


Photo

Total brightness tungsten vs daylight


  • Please log in to reply
1 reply to this topic

#1 David Edward Keen

David Edward Keen
  • Basic Members
  • PipPipPip
  • 116 posts
  • Student
  • New York City

Posted 29 December 2016 - 06:36 PM

Newbie's question here. 

 

How much does the total output in terms of i guess footcandles/lux decrease if i put a tungsten (3200K) diffusion over the 5600K LED light? It's one of those tungsten diffusion plastic plates goes right over the light.

 

I know that putting a CTB in front of my 3200 K greatly reduces the amount of light goin out.

 

I'm videoing three guys interacting on a street and I'm concerned about keeping them all inside the DOF. If I have enough light I can do a higher F stop but i probably don't, even with the street light over us.

 

 

 

 

 

 


  • 0

#2 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19103 posts
  • Cinematographer
  • Los Angeles

Posted 29 December 2016 - 08:15 PM

It's the same as an 85B (orange) or 80A (blue) camera correction filter -- 2/3-stop for full orange (actually closer a 3/4-stop) and 2-stops for full blue.

 

A stop is equal to half or double the light, so you will cut the footcandle output by almost in half with the Full CTO correction.


  • 0


Pro 8mm

CineTape

Visual Products

Willys Widgets

Zylight

rebotnix Technologies

Rig Wheels Passport

Tai Audio

Quantum Music Works

FJS International, LLC

Glidecam

Metropolis Post

Paralinx LLC

Ritter Battery

The Slider

Abel Cine

CineLab

Technodolly

Aerial Filmworks

Broadcast Solutions Inc

FJS International, LLC

Tai Audio

Ritter Battery

The Slider

Pro 8mm

Visual Products

Broadcast Solutions Inc

CineTape

Aerial Filmworks

rebotnix Technologies

Paralinx LLC

Technodolly

Willys Widgets

CineLab

Metropolis Post

Abel Cine

Zylight

Rig Wheels Passport

Quantum Music Works

Glidecam