 Sue C. Cole |
Making a stain show up on camera OK this is a strange one, I hope someone out their can help. I have this friend who had rented his house out and the renters had un-wanted dogs in the house. The renters moved out and the carpet was left with dog urine stains all over it. He cleaned it but with the fluorescent light it is still very noticeable. When he try took a picture it, the stain will not show up on the digital screen. He tried with and with out flash. He needs to be able to prove this in court so he needs to have a way to make it show up on the camera, any suggestions would be much appreciated. I know it’s a bit weird but I told my friend I would ask. Hope someone can help! Thank you in advance. Sue
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Brenda D. |
use your black light and your camera on "bulb" for a longer exposure. Ive never done it before but it should work.
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Samuel Smith |
i just wanted to stop by.black light is a different spectrum,can it be captured? maybe ir? not weird,inquiring minds want to know. sam
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Brenda D. |
I don't know but now I have to try it ,just to see if it works!!!!LOL
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Samuel Smith |
c'mon brenda,don't be relieving yourself on your carpet?blacklight or not.paints quite the picture? and,oh I am so teasing. or is it I wonder why you still have a blacklight? i'm just hoping it was the dogs and not the tennants? oh my g. sam
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Brenda D. |
LOL I wont be releaving myself on the carpet anytime soon.the black light is my teenage son's I have no idea where it came from, but people who wear contacts look really freeky in it!!!I saw on tv where it finds more than urine EEEWWWWWWW!!!
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Alan N. Marcus |
Hi Sue, Your problem revolves around the fact that the human eye sensitivity to light and color is different from film and digital chip sensitivity. Additionally the light emitted by florescent tubes is broken up as to color. Stated another way, florescent light is not a continuous spectrum. To add the missing color frequencies you need to introduce light from ordinary incandescent household light bulbs. The formula is 60 watts of incandescent intermixed with 40 watts of florescent. Most household florescent tubes are 48 inches long. They are rated at about 40 watts. Most are cool white. The tube will read T12CW40 (or something like that. Count the tubes in the room (ceiling fixture) and buy several utility pin-up fixtures. Say there are 4 tubes in the ceiling fixture. Four times 40 = 160 watts of florescent. You will need 60 times 4 = 240 watts of incandescent. Load the incandescent into the pin-up fixtures and flood the area with their incandescent light. It may be possible to record the pet stain using less than the 240 watts of incandescent. The trick is to commingle both types. The formula I provided yields a CI (color index) of 90 which is good. This method may also be used to illuminate an area where color pictures are to be judged and evaluated. One can purchase CI 90 or CI95 fluorescents but at a price I am unwilling to pay. Best regards,
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Samuel Smith |
thanks alan.
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Sue C. Cole |
Thanks for all for your feedback I really appreciate the humor with the technical advice. Sue
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Christopher A. Vedros |
Digital cameras can record things illuminated with black lights. HERE'S an example. Chris A. Vedros
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Sue C. Cole |
Thanks Chris for the advice. I checked out your example. You Website is very impressive. Heres a new question. How did you make the link for the example work? Sue
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Oliver Anderson |
Hey Sue, just read this question and thought since I'm staying at a friends house I'd test out this theory. As soon as it dries I'll post the results! Anyways I've photographed with backdrops backlit with black lights and in my gallery the NY Cityscape is a black light painting. what about videotaping the blacklight since it works on CSI?
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Sue C. Cole |
Thank Oliver, can't wait to see the results! LOL
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