EX1 tells me my 5600K MicroPro is 8400K at DVinfo.net

Omar Idris · December 27th, 2009, 10:31 AM

So I just took delivery of this light which is rated at 5600K. Slapped on the ND64 and took a reading straight off the light. EX1 says 8400K. Took a reading off my white balance card (Digital Grey Kard), EX1 says 11000K! The funny thing is, the card is redder at 8400K. Slapped on the 1/4 CTO that came with the light, EX1 says 5500K.
Anybody here have this combination of camera/light with a similar experience?

Olof Ekbergh · December 27th, 2009, 01:54 PM

I have a couple different LED lights.

They actually vary quite a bit in temp. Current flow through LEDs change the brightness. They use constant current devices to control brightness. They are very different from HMI fluorescent and tungsten lights, and there are a lot of different kinds.

I have been looking into them for a while now. I am building "ring-lights" that will be affordable using dimmable LED's.

I think LEDs are great, but we are only now starting to get a good idea of what they can do. They are not necessarily full spectrum.

It is also possible that your EX1 may give false numbers. The main thing is how does it look on a good monitor and or scopes.

Marty Welk · December 27th, 2009, 02:43 PM

here is the most crasy continual running thread about spectrum analisis of LEDs, and diodes and even incan and such.
Spectrographic analyses, pg. 3 - CandlePowerForums
to start at the start of it, you have to go back 3 whole threads besides
Spectrographic charts - CandlePowerForums

December 27th, 2009, 10:31 AM	#1
Omar Idris Regular Crew Join Date: Mar 2008 Location: Middlesex, UK Posts: 28	EX1 tells me my 5600K MicroPro is 8400K So I just took delivery of this light which is rated at 5600K. Slapped on the ND64 and took a reading straight off the light. EX1 says 8400K. Took a reading off my white balance card (Digital Grey Kard), EX1 says 11000K! The funny thing is, the card is redder at 8400K. Slapped on the 1/4 CTO that came with the light, EX1 says 5500K. Anybody here have this combination of camera/light with a similar experience?

December 27th, 2009, 02:43 PM	#3
Marty Welk Major Player Join Date: Sep 2008 Location: East Bay Cali Posts: 563	here is the most crasy continual running thread about spectrum analisis of LEDs, and diodes and even incan and such. Spectrographic analyses, pg. 3 - CandlePowerForums to start at the start of it, you have to go back 3 whole threads besides Spectrographic charts - CandlePowerForums __________________ ----------------sig----------------- Re-learning everything all over again, one more time.

December 27th, 2009, 01:54 PM	#2
Olof Ekbergh Sponsor: Westside AV Join Date: Dec 2008 Location: Mount Washington Valley, NH, USA Posts: 1,365	I have a couple different LED lights. They actually vary quite a bit in temp. Current flow through LEDs change the brightness. They use constant current devices to control brightness. They are very different from HMI fluorescent and tungsten lights, and there are a lot of different kinds. I have been looking into them for a while now. I am building "ring-lights" that will be affordable using dimmable LED's. I think LEDs are great, but we are only now starting to get a good idea of what they can do. They are not necessarily full spectrum. It is also possible that your EX1 may give false numbers. The main thing is how does it look on a good monitor and or scopes.