A Green Problem?

[dsbarch]

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The attached is a photo of the back of an apartment block with at least four, obvious, types of lighting - high pressure sodium, incadescent, metal halide (?) and h.i.d. - and what I call h.i.d. has an exceptional green cast. The others are not far from reallity or what would be expected. It seems that whether using an M8 or otherwise, light source is going to play tricks with color to some degree or other with any system. The photo was made with a Digilux 2; Aperture Priority 1/3.2 sec, f/2.2, 800 x 600; Auto White Balance and Exposure Comp. 0.

 

dsb

[jlancasterd]

The attached is a photo of the back of an apartment block with at least four, obvious, types of lighting - high pressure sodium, incadescent, metal halide (?) and h.i.d. - and what I call h.i.d. has an exceptional green cast. The others are not far from reallity or what would be expected. It seems that whether using an M8 or otherwise, light source is going to play tricks with color to some degree or other with any system. The photo was made with a Digilux 2; Aperture Priority 1/3.2 sec, f/2.2, 800 x 600; Auto White Balance and Exposure Comp. 0.

 

dsb

 

Isn't the greenish HID light a Mercury vapour lamp? This has a very odd spectrum and is very difficult to handle - especially when mixed with daylight and other sources (I regularly have to shoot in a workshop where Mercury vapour, fluorescent and tungsten lights supplement daylight...)

[dsbarch]

Hi John,

 

You are most likely correct. It sounds as though you have a much better foundation in lighting than I. And I had not thought of mercury vapor. Thanks for you comment.

 

dsb