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Canon GL Series DV Camcorders
Canon GL2, GL1 and PAL versions XM2, XM1.


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Old October 29th, 2003, 12:21 PM   #1
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Shooting In Blacklight?

I am wondering if anybody here has had success shooting in Blacklights with the GL2, I run into the Issue of the light turning out Green instead of Purple.

I am wondering if there are any settings that I can change to make this work, or if I would have to get some sort of filter for it (Or is it even Possible on DV!)

Anyway, I hope somebody here knows, I can't seem to find any information about it and I have a client that would like to do this for a music video!
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Old November 1st, 2003, 04:01 PM   #2
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cameras in general have a problem with the color purple. I read on some other post about this.



Try a search on "purple"


-kay
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Old November 3rd, 2003, 10:16 AM   #3
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Curt,
Thanks for the tip, I will check it out!
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Old November 3rd, 2003, 12:04 PM   #4
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Did you manually white-balance the camera first? This is defintiely a case where I would not tust the auto white-balance. Try setting the white-balance under the conditions you will be shooting and see if it helps.
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Old November 8th, 2003, 11:17 AM   #5
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Jeff,
I never trust the auto-white's, or the auto anything for that matter!
I still cannot find anything about this anywhere I seem to look.

I can't believe that with this many people on this board that NOBODY has shot in blacklight before!!! (Ive seen movies where it was done, sombody has to know!)
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Old November 9th, 2003, 07:14 AM   #6
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Back lighting is a major probolem for any imaging system if you want to obtain detail in the back-lit subject rather than just a silhouette effect.

Try increasing the exposure manually or using the exposure adjustment features of the camcorder. Avoid having a very hot spot/light source in the visible background of the image. You could try some added fill lighting to improve shadow detail.
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Old November 10th, 2003, 12:14 PM   #7
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no, no, BLACKlight, not backlight :o)

thanX though ;o)
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Old November 11th, 2003, 10:07 AM   #8
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Kray,

Many CCDs are sensitive to wavelengths beyond those the human eye can see. Coatings are supposed to sut down on some of these but not necessarily all. For example, many digital cameras have IR filters specifically to remove the IR wavelengths - otherwise we would need what are called Hot filters.

It is possible that the effect you are seeing is from the additional near UV wavelengths. If that is the case then the only way to solve the issue would be with a proper UV filter. There was a thread on here recently that pointed to a web site reviewing many of the popular UV filters. Turned out that many of them didn't block much of anything (I think the Hoya was an exception).

It might be worth trying some different UV filters to see if it skews the colors back toward purple.
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Old November 12th, 2003, 10:55 AM   #9
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Jeff,
Excellent suggestion, I will see if I can find those reviews and gt a filter based on that and see if it works!
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