Scary White Balance Occurance.

Chadfish

Chadfish

Veteran
So I was doing a shoot in a small studio. Simple lighting, overhead track lighting, and some cheap incandescent 200w type lights on each side of the camera. I have done this shoot many times before.

Today I had the talent hold up a white towel, and I did the WB. The towell looked right, and zoomed back to reveal that everything else turned a bright green. Very green!. I repeated the WV a few times and couldn't shake the green. The WB put the temp at around 2300. After turning offr the cam, and trying preset A & B a couple more times I got it back, but it scared me. I could not tell if the camera malfunctioned, or what. Like I said, the white card (a towel) looked right on, but everything else looked like there was a green filter over the lens.


Any thoughts? Similar experiences?

Chad
 
I've seen what I think you're describing when using the white card from the Warmcards deck. I attributed it to the fact that I have essentially overexposed the whitecard - I closed down the iris to bring the exposure down and tried the white balance again, and it worked fine after that. I've seen this mostly when my lighting is fluorescent...
 
I don't recall this feature on my original EX1 but my EX1R informs you if your white card for balance is overexposed while setting it so you can iris down.

Regarding your green issue I never had it happen on my cams but you should call Sony and see if they suggest it be serviced f you're confident there was no other light contamination.
 
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Would this be the same as the zebras? I'd imagine that would help if nothing else. I'm not an expert, but I believe white balance is less concerned with exposure (as long as you're not doing something too ridiculous) than with just pointing at something truly white...
 
Same thing happened to me, too. Overexposed white card. Iris down to mid grey and white balance works fine.
 
On extremely RARE occasions (twice since I've owned mine), I've seen the EX1 come up "green gun only". The only corrective measure is to reboot the camera and then all's well.
 
I've had this occur a few times in the past year; once the image(card) was definitely overexposed and stopping down solved it, another time there was no apparent reason and stopping down didnt help, reboot solved it. Terrifying the first time that happens huh?..
 
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