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Bright surfaces


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#1 Matteo Castelli

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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)
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#2 Adrian Sierkowski

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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.
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#3 Matteo Castelli

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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?
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#4 Adrian Sierkowski

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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.
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Visual Products

Glidecam

rebotnix Technologies

Rig Wheels Passport

Tai Audio

Gamma Ray Digital Inc

Wooden Camera

Media Blackout - Custom Cables and AKS

The Slider

Abel Cine

FJS International, LLC

CineTape

Opal

CineLab

Ritter Battery

Broadcast Solutions Inc

Technodolly