Re: Colour Temperature

"Mike Cook" <mjcook@xxxxxxxxxxxx> wrote in message
news:5UVLe.7248$QU4.6721@xxxxxxxxxxxxxxxxxxxxxxx
>
> "Rob Novak" <rob.novak@xxxxxxxxxxxxxxxxx> wrote in message
> news:5eluf1hc4vh4cidp6f3vcflpmjjri76dtj@xxxxxxxxxx
> > On Sun, 14 Aug 2005 07:13:04 GMT, "Mike Cook" <mjcook@xxxxxxxxxxxx>
> > wrote:
> >
> >>I took a picture and the light was a mixture of Sodium and Daylight ,
what
> >>would the colour temprature be?
> >
> > That looks more like mercury-vapor or HID lighting (combination of
> > xenon, mercury, and other halides). Pure LPS sodium-vapor is
> > typically very yellow, and that isn't, nor does it look like HPS
> > lighting, which normally has a pinkish-orange cast.
> >
> > Mercury vapor and HID are fractured-spectrum lighting (not continuous
> > emission), and have an average color temperature near that of
> > daylight: 5200-5900K depending on the halide component and the use of
> > phosphor coatings. Keep in mind that they emit their light in fairly
> > narrow bands, so even though the overall temp is daylight-ish, they
> > don't tend to render colors accurately.
> >
> Thank Rob , very detailed answer. Im going back to this location next
week
> and will have more time to check what type of lighting is used. The image
> posted had not been corrected and was taken using AWB
>
>

You posted that "... Im going back to this location next week
and will have more time to check what type of lighting is used. ..."

Take a picture of an 18% Gray Card ... at the exact time of day, and using
the exact same camera settings ... and you can use that picture to set up
'Color Correction' in PhotoShop.




.

Relevant Pages

  • Re: Colour Temperature
    ... >>I took a picture and the light was a mixture of Sodium and Daylight, ... > xenon, mercury, and other halides). ... > lighting, which normally has a pinkish-orange cast. ...
    (alt.photography)
  • Re: Colour Temperature
    ... >I took a picture and the light was a mixture of Sodium and Daylight, ... lighting, which normally has a pinkish-orange cast. ... Mercury vapor and HID are fractured-spectrum lighting (not continuous ...
    (alt.photography)
  • Colour Temperature
    ... I took a picture and the light was a mixture of Sodium and Daylight, ... would the colour temprature be? ...
    (alt.photography)
  • Re: Colour Temperature
    ... >I took a picture and the light was a mixture of Sodium and Daylight, ... >would the colour temprature be? ...
    (alt.photography)
  • Re: Colour Temperature
    ... >I took a picture and the light was a mixture of Sodium and Daylight, ... >would the colour temprature be? ... Sodium is 2100 deg. K ...
    (alt.photography)