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I know this has been discussed before, but here is a specific problem that somebody may be able to help me with. I don't know if the problem is with the settings on my digital camera or if it's a physics or chemistry problem. The attached photo is of stained glass and glass block indirectly lit with ultra blue neon. Ultra blue neon is unique in that it has a black light effect and some designers prefer it over the other blues because of this.

When looking at the stained glass and glass block with the naked eye, it is a beautiful blue hue, but when I take pics of it I get all this red color in it, almost as if the neon were purple. Do we have any digital camera experts on board? I know we have at least one chemist? What do you think, Dr. Mark?

BTW, the purple color you see is behind clear stained glass with white transluscent plex behind it. The photo was taken without flash. Usually when I take pics of blue neon, it shows blue white. This is the first pic I've taken of ultra blue.

Actually, I was wrong. The Oysters, etc. are also ultra blue and they're showing white. Could it be the white plex giving it the purple color?

post-181-1128353732.jpg

post-181-1128354887.jpg

Edited by joemomma

joemomma

I do it in the transformer box.

1946-2008

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Is your "red eye" setting on off? Longer exposure rate too, and use a tripod stand

I thought red eye was a ham and coffee gravy in Kaintuck. Mmmm-mmmm good!

From my camera manual - "Red eye reduction - Pre-flash lamp lights before main flash. This causes subject's pupils to contract before main flash fires, minimizing red eye." This feature would have no effect on inanimate objects as far as I can tell. Plus, I didn't use a flash. Shutter speed was fast. I obviously didn't use a tripod. I'll try it, but don't see what that would have to do with it. But then, I'm no expert.

joemomma

I do it in the transformer box.

1946-2008

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...snip... But then, I'm no expert.

Well, neither am I when it comes to camera's :P Nor am I a doctor or chemist. Just a po' 'ol neon bender :blink:

I don't know about digital camera's but I do know that film camera's are sensitive to the red and violet spectrums. If digital's are as well then they would more than likely display the same effects as a film camera. If ultra blue emits close to the ultra violet spectrum (purple-violet-black light) that could be your problem. You may need to use an ultra violet filter to get it to look right. Just as wild-ass guess 'cause I don't really know for sure.

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Nor am I a doctor or chemist. Just a po' 'ol neon bender :blink:

I don't know what's the matter with me. :pillepalle: Yes I do. I was broadcasting when I should've been tuning.

joemomma

I do it in the transformer box.

1946-2008

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