|
|||||||||
![]() |
|
Thread Tools | Search this Thread |
![]() |
#1 |
Major Player
Join Date: Jun 2008
Location: Houston, TX
Posts: 565
|
green tint wb on ex1r
sometimes when im setting my wb theres a major green tint. wb on a white background with my led light and the yellow filter on it. very odd.
|
![]() |
![]() |
![]() |
#2 |
Major Player
Join Date: Jan 2010
Location: Nieuw-Vossemeer, The Netherlands
Posts: 455
|
Re: green tint wb on ex1r
Jim , I once experienced the same with certain settings. I started a trhread about that "white balance in PP different from A/B" at June 6th this year and got the answer from some people who knew what was happening. Please search for this thread, it may have the answer for you too.
|
![]() |
![]() |
![]() |
#3 |
Inner Circle
Join Date: Dec 2005
Location: Bracknell, Berkshire, UK
Posts: 4,957
|
Re: green tint wb on ex1r
LED lights do not have a full spectrum output. A white LED bulb is normally constructed using a blue LED with a phosphor coating that absorbs some of the blue and re transmits it as red/green. As the blue LED only produces a very narrow bandwidth of blue light the result is an uneven light source with gaps and holes in the spectrum produces. Our eyes tend to disregard these gaps and holes, but the electronic sensor of a video camera see's these gaps and spikes and the end result is unusual colour casts or peculiar looking colours.
__________________
Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com |
![]() |
![]() |
![]() |
#4 |
Trustee
Join Date: Oct 2009
Location: Mesa, AZ
Posts: 1,389
|
Re: green tint wb on ex1r
LED was the red flag that went up for me too upon reading your issue. Instead of yellow filter, try a minus green on the LED. If it's a daylight fixture (which all of mine are) I white balance with a warm card which seems to help a lot.
__________________
The older I get, the better I was! |
![]() |
![]() |
![]() |
| ||||||
|
|