Jump to content


Photo

Bright surfaces


  • Please log in to reply
3 replies to this topic

#1 Matteo Castelli

Matteo Castelli
  • Basic Members
  • PipPip
  • 22 posts
  • Cinematographer
  • Italy

Posted 21 May 2008 - 05:07 PM

Hi everybody,
I wonder how to measure a bright surface, such as a film screen, or something similar..
Something that doesn't receive the light, but where the light comes from..

thank all folks! B)
  • 0

#2 Adrian Sierkowski

Adrian Sierkowski
  • Sustaining Members
  • 7373 posts
  • Cinematographer
  • Los Angeles, Ca

Posted 21 May 2008 - 05:09 PM

Spot meter woudl give oyu the reading to make that surface = to 18% grey, from there the zone system helps one set it as white, or assort it a brightness.
  • 0

#3 Matteo Castelli

Matteo Castelli
  • Basic Members
  • PipPip
  • 22 posts
  • Cinematographer
  • Italy

Posted 22 May 2008 - 02:27 AM

Spot meter woudl give oyu the reading to make that surface = to 18% grey, from there the zone system helps one set it as white, or assort it a brightness.


obviously you mean the reflection reading of the surface..
so I should start from it and then I have to balance the other light with my bright surface to achieve my purposes, right?
  • 0

#4 Adrian Sierkowski

Adrian Sierkowski
  • Sustaining Members
  • 7373 posts
  • Cinematographer
  • Los Angeles, Ca

Posted 22 May 2008 - 04:57 PM

Basically, by using the reflective meter readings (spot readings) you're recieving the stop to take whatever object @ whatever intensity and turn it into 18% grey. So exposing a white object at the spot meter reading, or building your lighting around that reading alone, without compensating to make it white again (by opening up 2 stops or so) will underexpose everything.
Hope that makes some sense.
  • 0


Willys Widgets

Visual Products

Abel Cine

Glidecam

Ritter Battery

FJS International, LLC

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

Metropolis Post

Aerial Filmworks

rebotnix Technologies

Tai Audio

The Slider

New Pro Video - New and Used Equipment

Technodolly

Rig Wheels Passport

CineLab

Gamma Ray Digital Inc

Wooden Camera

Paralinx LLC

CineTape

Abel Cine

Visual Products

Tai Audio

FJS International, LLC

Rig Wheels Passport

Broadcast Solutions Inc

Paralinx LLC

Glidecam

Media Blackout - Custom Cables and AKS

Wooden Camera

Metropolis Post

CineTape

Ritter Battery

Aerial Filmworks

rebotnix Technologies

Gamma Ray Digital Inc

Technodolly

New Pro Video - New and Used Equipment

Willys Widgets

CineLab

The Slider