I "discovered" the Kelvin meter on my D80 this weekend for white balance. Now how COOL is this????
I do have a fair idea of the light temperature as I shoot glass and pottery for eBay under artificial lighting, and I guessed spot on with the lighting I was shooting under, but I'd love to have a gadget that would measure the temperature of the lighting so I'm not guessing. I'm sure there is something out there, but no clue as to cost or where to look.
#1. "RE: Kelvin Measure???" | In response to Reply # 0
d700man Registered since 06th Nov 2009Mon 09-Nov-09 02:39 PM
#2. "RE: Kelvin Measure???" | In response to Reply # 0
HBB Charter MemberMon 09-Nov-09 03:10 PM
I have the Sekonic C500R reference by DG. It replaces an earlier Minolta Color Meter IIIF that I have had for years. It is everything you would want in a color tempertaure meter and more. Ambient, flash, etc., two modes, one for film and another for digital. The digital mode includes a different red sensor that matches the slight blue sensitivity of the red sensor in the human eye ... ingenious. The R version of this meter includes a transmitter that is used to fire speedlights via Pocket Wizards.
Expensive, yes. Worth it, definitely!
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#3. "RE: Kelvin Measure???" | In response to Reply # 2
Capriherb Registered since 31st Jan 2009Mon 09-Nov-09 03:14 PM
I don't need a light meter. That's sure a nice "gadget", heehee... But way out in the statosphere of my price range.
I'm sure it probably wouldn't even be for photographers necessarily. I would just like something to tell me the temperature in the lights in the room before I shoot.
Thanks for answering!!!
#4. "RE: Kelvin Measure???" | In response to Reply # 3
Arkayem Charter MemberMon 09-Nov-09 05:04 PM
>I don't need a light meter. That's sure a nice
>"gadget", heehee... But way out in the statosphere
>of my price range.
>I'm sure it probably wouldn't even be for photographers
>necessarily. I would just like something to tell me the
>temperature in the lights in the room before I shoot.
One thing that many people do not understand is white balance involves more than just temperature. It also involves red-green tint.
It turns out that incandescent, sunlight, shade, and cloudy are all perfectly balanced between red and green, so for these, white balance is a simple function of temperature.
However, if you start looking at more complex lighting, like fluorescent, you see the temperature is about 3800, but there is also a distinct green color that needs to be balanced with about 15% more red than green.
Other non-neutral colors come from things like red emergency lighting, sodium vapor street lamps, mercury auditorium lamps, underwater aquarium light, etc. Every non-neutral light requires a certain amount of red or green plus the proper temperature to make it appear like normal white light.
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#5. "RE: Kelvin Measure???" | In response to Reply # 4
Chan Tran Registered since 04th Dec 2003Tue 10-Nov-09 01:32 AM
the color temperature is based on the black body radiation. There isn't really any of such available but incandescent light, the sun are very close to it. The other light source like fluorescent, sodium vapor are not.
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