Jump to content


Photo

Spot Metering and Descriptions


  • Please log in to reply
2 replies to this topic

#1 Barry Cheong

Barry Cheong
  • Basic Members
  • PipPip
  • 62 posts
  • Student
  • Toronto, Canada

Posted 06 July 2006 - 09:34 PM

I was wondering how you would describe your exposure relations when using a spot meter?

For instance I shot a film with a character in a white void. It was shot in studio against a white cyc. I lit and exposed the main subject at T 2.8 and I was spot metering the white cyc at T 16. If I were to describe this to someone would I say that the cyc was 5 stops over or would I have to take into account that the cyc was white, so maybe closer to 3 stops since the spot meter is averaging for 18% grey?
  • 0

#2 Michael Nash

Michael Nash
  • Sustaining Members
  • 3330 posts
  • Cinematographer
  • Pasadena, CA

Posted 06 July 2006 - 11:38 PM

You just say it in a way that avoids as much confusion as possible. So you could say "it spot meters at t-16." Usually when you say something is overexposed by a certain amount, it means relative to a "normal" incident exposure.
  • 0

#3 Mark T. Karinja

Mark T. Karinja

    New

  • Basic Members
  • Pip
  • 5 posts
  • Cinematographer

Posted 06 July 2006 - 11:48 PM

I was wondering how you would describe your exposure relations when using a spot meter?

For instance I shot a film with a character in a white void. It was shot in studio against a white cyc. I lit and exposed the main subject at T 2.8 and I was spot metering the white cyc at T 16. If I were to describe this to someone would I say that the cyc was 5 stops over or would I have to take into account that the cyc was white, so maybe closer to 3 stops since the spot meter is averaging for 18% grey?


Caucasian skin tone is one stop above middle gray (18%). Therefore, if you read your subject (assumingly a Caucasian subject) with a spot meter at 2.8, 18% gray is 2.0. T. 16 would then be 6 stops hotter then middle gray (18%). When explaining spot meter exposures, your reading is based only on reflectiveness (meaning that the cyc being white as well as any other colors in your scene are already accounted for and their reflective abilities) and may be most easily understood in terms of middle gray (stops under or over 18%).
  • 0


Wooden Camera

Aerial Filmworks

New Pro Video - New and Used Equipment

Gamma Ray Digital Inc

Paralinx LLC

Technodolly

The Slider

Rig Wheels Passport

rebotnix Technologies

CineLab

Metropolis Post

CineTape

Willys Widgets

Tai Audio

Visual Products

Media Blackout - Custom Cables and AKS

Glidecam

Ritter Battery

Broadcast Solutions Inc

Abel Cine

FJS International, LLC

Ritter Battery

Glidecam

CineTape

Technodolly

Rig Wheels Passport

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

CineLab

Gamma Ray Digital Inc

rebotnix Technologies

Metropolis Post

Abel Cine

Willys Widgets

FJS International, LLC

New Pro Video - New and Used Equipment

Tai Audio

Aerial Filmworks

Visual Products

The Slider

Wooden Camera

Paralinx LLC