View Full Version : False colour Vs histogram
I noticed a slight discrepancy between false colour and the histogram. One of the traffic lights was lit up when the false colour was only showing 2 stops over reference. I realised had the camera set to 5600 when the lighting was tungsten. When I switched the camera to tungsten the histogram and FC lined up nicely.
Does this mean that FC is only accurate with white (balanced) light?
Ramesh Jai
08-05-2009, 09:34 AM
Interesting. I need to know the answer to this too.
Ido Karilla
08-05-2009, 11:12 AM
Ramesh Jai
"Interesting. I need to know the answer to this too."
Me too!
Stuart English
08-05-2009, 12:16 PM
Its always a good idea to white balance -
Its always a good idea to white balance -
Certainly, but sometimes one wants to have a cast to the overall picture. A hint of blue for night or a touch of warmth for a summer evening.
Sorry, I don't mean to be negative. I think FC is a great tool and appreciate the latest modification, but it would be useful to know which (FC or traffic lights) is more likely to be accurate in terms of clipping on the rare occasions I am shooting off-white.
Stuart English
08-05-2009, 01:06 PM
Certainly, but sometimes one wants to have a cast to the overall picture. A hint of blue for night or a touch of warmth for a summer evening.
... it would be useful to know which (FC or traffic lights) is more likely to be accurate in terms of clipping on the rare occasions I am shooting off-white.
For sure. They are both "accurate" but understand that they are measuring different things.
False color (video overlay) measures the sum of R+G+B but the histogram and traffic lights measure individual R / G / B values, so when your WB is off, there can be a visual difference between them.
If you want a meter that only reflects the camera RAW data (which by definition is not White Balanced or Gained up or color corrected in any way) look at the RAW Sensor Meter to the right of the histogram.