[Jewelry making - Article 00976] - Re: [Orchid] Lighting for photographing jewelry

[David Barzilay Lord of the Rings]

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    I have been researching photo lighting recently. If anything which I
    write, is INCORRECT, I hope an Orchidian who knows better will
    correct me. 

    Quartz lamps are better described as "quartz-halogen." They are
    incandescent (a glowing filament, same idea as your standard
    lightbulb); the envelope is high temperature quartz; and the
    atmosphere is a halogen gas, like iodine or bromine.  The principle
    is that this preserves the metal of the filament from boiling away and
    also from coating the inside of the envelope. They have bee around
    for 40 years or so. 

    Today, there are other high intensity light sources in use.  H.I.D.
    is brighter, whiter and MUCH more expensive. (not to be confused with
    HIV which is dumber, no color, and MUCH more deadly <g>.) 

    The "color temperature" of a light is very important, and you must
    match your film to the light source.  

    With many digital cameras, you can use the 'white balance' feature to
    tell the camera: "This is the lighting which I use...you may consider
    this to be pure white." 

David Barzilay
Lord of the Rings
607 S Hill St Ste 850
Los Angeles, CA 90014-1718
213-488-9157


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