Jump to content


Photo

Averaging light meter readings


  • Please log in to reply
2 replies to this topic

#1 Mark A. Rapp

Mark A. Rapp
  • Basic Members
  • PipPip
  • 58 posts
  • Cinematographer

Posted 03 March 2007 - 12:37 PM

Question: When taking multiple light readings on set, when averaging the readings, should one average the number readings as a regular average?

Example: 2.8 + 5.6 = 8.4

8.4/2 = 4.2

So the setting is 4.2?

Or is there another formula for this type of averaging?
  • 0

#2 Stephen Williams

Stephen Williams
  • Sustaining Members
  • 4708 posts
  • Cinematographer
  • Europe

Posted 03 March 2007 - 01:14 PM

Question: When taking multiple light readings on set, when averaging the readings, should one average the number readings as a regular average?

Example: 2.8 + 5.6 = 8.4

8.4/2 = 4.2

So the setting is 4.2?

Or is there another formula for this type of averaging?



Hi,

FWIW the mid point between 2.8 & 5.6 is 4!

I don't average readings, I decide how I want the shot to look like and expose acording to that. The question is how much under or over Key do I want a light to be.

Stephen
  • 0

#3 Jonathan Bowerbank

Jonathan Bowerbank
  • Basic Members
  • PipPipPipPip
  • 2815 posts
  • 1st Assistant Camera
  • San Francisco, CA

Posted 03 March 2007 - 01:25 PM

Example: 2.8 + 5.6 = 8.4

8.4/2 = 4.2

So the setting is 4.2?

Or is there another formula for this type of averaging?


Wow...anyway

Yeah, you don't want to just set your aperture to what's average for all the readings you get.

Decide what you want at key, under and over, then set your f-stop accordingly. Or better yet, as I do, decide on an f-stop beforehand and meter everything according to that.
  • 0


FJS International, LLC

Metropolis Post

Rig Wheels Passport

CineTape

Visual Products

Wooden Camera

Ritter Battery

Aerial Filmworks

Glidecam

Abel Cine

rebotnix Technologies

CineLab

Gamma Ray Digital Inc

Broadcast Solutions Inc

Paralinx LLC

Media Blackout - Custom Cables and AKS

Tai Audio

Opal

Technodolly

The Slider

Willys Widgets

Tai Audio

Technodolly

Visual Products

rebotnix Technologies

Ritter Battery

Aerial Filmworks

CineTape

FJS International, LLC

Gamma Ray Digital Inc

Metropolis Post

The Slider

CineLab

Rig Wheels Passport

Paralinx LLC

Broadcast Solutions Inc

Abel Cine

Glidecam

Opal

Wooden Camera

Media Blackout - Custom Cables and AKS

Willys Widgets