X-Waldemar_Winkler
Imported Account
Mar 4, 2004, 8:14 PM
Post #3 of 5
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Re: XL1 color temperature shift
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Have you recently removed the lenses on the XL1's for any reason? If so, carefully
clean the mounting plates of both camera and lenses with a solvent like denatured
alcohol. Here is why:
Many years ago I was preparing my cameras for a multi-camera shoot of a business
meeting. Shortly into my set-up I noticed one of my cameras was horribly green,
and try as I might, I couldn't make the green go away. The shoot was just a few
hours away, and I was in a rural location that made deliver of replacement
equipment impossible. In a panic I placed a call to the manufacturers tech support.
When I explained my camera's symptoms to the support tech, he gave tthe following
answer:
"I think I know your problem. This happened to me not too long ago, and it took
me two weeks to figure out the solution. To save space, negative electrical
connection for the
camera's many operating features is run through the camera chassis. Over time and
normal use the exposed parts of the chassis will acquire a thin film of grime from
dust, humidity, fingerprints, etc. This film can alter electrical resistance just enough
to make your camera do some very strange things."
I immediately cleaned the mounting plates of both camera and lens and voila! The
green was gone. I had perfect color. And the shoot was a success.
Just a thought. Hope it helps.
: For the last two years I have been shooting monthly college board meetings using
three XL1s connected to a switcher. Things have always gone smoothly enough
until last month. We were shooting in a new location filled with acres of old
florescent lights. During the evening we noticed that the color temp of the picture
on our program monitor was slowly shifting back and forth (every 5 seconds or so)
between very cold and very warm (almost orange.) Two out of the three cameras
were affected. The third camera, facing the opposite direction, was fine.
: Initially we wanted to blame the florescent lights. We had the cameras on
automatic WB. We tried changing to automatic WB to see if the cameras could
compensate on their own, but it only got worse (leading us to read manual WB on
the fly.)
: Has anyone experienced or heard of someone experiencing difficulty with white
balance on the XL1? Has anyone experienced or heard of someone experiencing
such a radical phenomenon related to florescent lights?
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