Jump to content


Photo

Calibrating color meters


  • Please log in to reply
1 reply to this topic

#1 Jayanth Mathavan

Jayanth Mathavan

    New

  • Basic Members
  • Pip
  • 6 posts
  • Cinematographer

Posted 21 December 2011 - 12:46 AM

Hi,
In my film school, we have three color meters. There are two Sekonic Prodigi Color C-500 and one Minolta Color Meter IIIF. But right now, all the three color meters are showing different color temperatures when measuring the same light source. The difference ranges around 300k to 500k from one color meter to another color meter. So am not sure which color meter is showing the correct color temperature. Can anyone please guide me on how to judge which the correctly working color meter. and also is there a way we can calibrate the color meter? please help.

Thanks and Regards
Jayanth
India
  • 0

#2 Marcelo Ragone

Marcelo Ragone

    New

  • Basic Members
  • Pip
  • 1 posts
  • Gaffer

Posted 11 April 2012 - 01:41 AM

Hi Jayanth:

An absolute test of a color meter is using a black body. I never seen a real one, but I heard there are some at the meters factory. It may be others at some optics or physical department.
A more practical test is by using a naked, new, cinematography tungsten lamp. If the voltage is right the color temperature should be right. You may also verify it with a digital camera; (I guess) grey card should photograph grey using the tungsten white balance pre-set.
By the way, which color meter do you prefer, or consider best, Sekonic?, Minolta?

Thanks
Marcelo
Buenos Aires
Argentina
  • 0


rebotnix Technologies

CineTape

CineLab

Gamma Ray Digital Inc

Technodolly

Broadcast Solutions Inc

Media Blackout - Custom Cables and AKS

New Pro Video - New and Used Equipment

Aerial Filmworks

The Slider

Wooden Camera

Willys Widgets

Rig Wheels Passport

Paralinx LLC

Abel Cine

Ritter Battery

Metropolis Post

FJS International, LLC

Visual Products

Glidecam

Tai Audio

Paralinx LLC

Ritter Battery

Aerial Filmworks

The Slider

Technodolly

CineTape

Willys Widgets

Metropolis Post

Wooden Camera

Gamma Ray Digital Inc

Visual Products

FJS International, LLC

Rig Wheels Passport

Broadcast Solutions Inc

CineLab

Abel Cine

Tai Audio

Media Blackout - Custom Cables and AKS

Glidecam

New Pro Video - New and Used Equipment

rebotnix Technologies