In article , Mr.T wrote:

"Dave Plowman (News)" wrote in message
...
That's more to do with the relative sensitivity of film color layers
etc.
They are specifically balanced for Daylight or Tungsten, and are wildly
innacurate when used with the wrong light source.

In which way are they 'inaccurate'? They will look wrong to the eye on a
'cut' but as with real life if all shots are matched the eye will
accommodate.

Not so. They ARE wrong. The relative densities of the individual film layers
will be quite innacurate when exposed with the wrong light.

The monitor you're reading this on is unlikely to match
*exactly* another one in colour temperature but will look ok to the
individual. The eye compensates, as I said, as it must do given that
daylight changes. Unless it has a reference to match to.

Which is everything else within your field of view. Only if *everything*
changes will the *brain* correctly compensate.

Err, yes. That's what I said. But it doesn't react instantly. Hence it
notices a sudden change in colour temperature. Like switching on 4500K
lights in a house when it gets dark.;-)

So a couple of minutes readjustment is abhorent to you?
Doesn't bother me too much.

Have you never wondered why most prefer the colour temperature of tungsten
for domestic lighting?

No, as I already stated it was simply conditioning from fires, candles, oil
lamps and tungsten filament globes.
Have you ever wondered why people aren't bothered by the change from
daylight, or in fact are able to wear coloured sun glasses, but can readily
pick an off balance color photo?

An off-balance color photo has its surroundings as a color reference.
It would be like having colored sunglasses coloring only a small portion
of your field of vision.

- Don Klipstein )