Using a light box with 2-500 watt halogen lights I have set the camera to the incandecent temperature range (about 2500 degrees) and manually adjusted the exposure to f/11 at 1/30 second and used a tripod. The shots turn out looking like thery were shot through Earl Grey tea, rather yellow to brown tinged. Unless I really over expose I can't get it to white. I am shooting against white foam board.
If I adjust the levels in photoshop everything pops into what it should be. This is with raw or jpeg.
Anyone have any suggestions how to get the results I want (whites to be white) out of the camera?
Shooting with a Canon20D, canon 50mm 1.8 or Canon 17X85mm 4.0 lens