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Black light.
Sep 1, 2021 16:54:46 #
I've been photographing pictographs for a long time.
I decided to try photographing with a black light to see if I'm missing anything.
Hope some of you have suggestions.
I decided to try photographing with a black light to see if I'm missing anything.
Hope some of you have suggestions.
Sep 1, 2021 19:27:43 #
Orphoto
Loc: Oregon
Play around with it. You should know that black light (uv) is absorbed by most forms of glass including camera lenses. There are a few lenses built just for that however. In addition the camera sensors will have a diminished sensitivity compared to visible light. Also know that UV light is damaging to your eyes.
Sep 1, 2021 20:00:14 #
Check out Photo Critique Section section of our forum.
Sep 1, 2021 20:03:25 #
Sep 2, 2021 06:21:27 #
Brian in Whitby
Loc: Whitby, Ontario, Canada
The most interesting results you will get will be from the fluorescent properties of the objects you are photographing.
Some minerals fluorece strongly under UV light.
Many other substances also fluoresce under UV as di some fluorescent markers, paints and other art supplies. awell.
Experiment with a variety of materials and see what you get. Please share your results.
Some minerals fluorece strongly under UV light.
Many other substances also fluoresce under UV as di some fluorescent markers, paints and other art supplies. awell.
Experiment with a variety of materials and see what you get. Please share your results.
Sep 2, 2021 06:50:17 #
Another thing to check out is your garden at night - many insects fluoresce under UV light.
Sep 2, 2021 07:44:49 #
Common household thing fluoresce ... Quinine water is one. Kitchen glow:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7227594/
Halloween is coming up and there will be many things containing fluorescent content. You can actually buy fluorescent dye inks and fill your cartridges to make interesting psychedelic prints.
"The psychedelic style peaked between 1966 and 1972. Many works, especially evident in concert and event posters, depicted a strong color palette—usually of contrasting colors—along with ornate lettering, and kaleidoscopic swirls. The art of this period also reflected Art Nouveau and Victorian influences."
The photo below is quinine water soda; the green I do not recall what I used. For $20 you can get a 100 bulb UV flashlight. UV florescent lights work well, but the cheap screw-in purple bulbs are not good. Walmart will have a variety on the shelf in October. Halloween is my favorite Religious Holiday.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7227594/
Halloween is coming up and there will be many things containing fluorescent content. You can actually buy fluorescent dye inks and fill your cartridges to make interesting psychedelic prints.
"The psychedelic style peaked between 1966 and 1972. Many works, especially evident in concert and event posters, depicted a strong color palette—usually of contrasting colors—along with ornate lettering, and kaleidoscopic swirls. The art of this period also reflected Art Nouveau and Victorian influences."
The photo below is quinine water soda; the green I do not recall what I used. For $20 you can get a 100 bulb UV flashlight. UV florescent lights work well, but the cheap screw-in purple bulbs are not good. Walmart will have a variety on the shelf in October. Halloween is my favorite Religious Holiday.
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Sep 2, 2021 07:48:56 #
larryepage
Loc: North Texas area
plumbbob1 wrote:
I've been photographing pictographs for a long time.
I decided to try photographing with a black light to see if I'm missing anything.
Hope some of you have suggestions.
I decided to try photographing with a black light to see if I'm missing anything.
Hope some of you have suggestions.
There is really no special trick to this. Even though you are illuminating your subjects with black light, what you are going to be photographing will be normal, visible light. The challenge is going to be that your working brightness levels are going to be very low.
Remember that 1/4 inch of glass filters almost all UV light out, plus your sensor has a UV filter. So you really won't be capturing any (or at least very much) actual UV in your images.
Sep 2, 2021 08:05:03 #
Actually, you can buy lenses that will transmit UV.
https://kolarivision.com/uv-photography-lens-compatibility/
Be sure to check out that beautiful woman with UV.
https://kolarivision.com/getting-started-uv-photography/
https://kolarivision.com/uv-photography-lens-compatibility/
Be sure to check out that beautiful woman with UV.
https://kolarivision.com/getting-started-uv-photography/
Sep 2, 2021 09:49:35 #
larryepage wrote:
There is really no special trick to this. Even though you are illuminating your subjects with black light, what you are going to be photographing will be normal, visible light. The challenge is going to be that your working brightness levels are going to be very low.
Remember that 1/4 inch of glass filters almost all UV light out, plus your sensor has a UV filter. So you really won't be capturing any (or at least very much) actual UV in your images.
Remember that 1/4 inch of glass filters almost all UV light out, plus your sensor has a UV filter. So you really won't be capturing any (or at least very much) actual UV in your images.
Yes, you’re not actually photographing UV light. You’re capturing things that fluoresce under UV light and that us in the visual spectrum, (or you wouldn’t be able to see it).
Sep 2, 2021 10:05:59 #
I'm getting the idea.
I don't find any documentation for this specific application (pictographs on rock facings) so I guess experimentation is the name of the game.
Mainly, don't want to purchase equipment that won't work or isn't applicable.
I don't find any documentation for this specific application (pictographs on rock facings) so I guess experimentation is the name of the game.
Mainly, don't want to purchase equipment that won't work or isn't applicable.
Check out Drone Video and Photography Forum section of our forum.
Sep 2, 2021 13:22:25 #
I wonder if a pinhole lens would work. You would need a long exposure especially if the anti-alias sensor filter reduces UV a lot.
Sep 2, 2021 13:26:36 #
Sep 2, 2021 14:10:11 #
hjkarten
Loc: San Diego, California
Many mammals, including mice, birds, fish, and many invertebrates have photoreceptors that detect UV. Humans do not have detectors sensitive in the UV range. There are reports, however, that suggest that some human beings can detect UV following cataract surgery.
In brief:
UV detection is distinct from the fluorescence that is elicited by UV. Fluorescence is traditionally defined as light that is elicited by excitation of an object with shorter wavelengths, and emitted as longer wavelengths. The most commonly emitted fluorescence may vary from slightly longer wavelength fluorescence, through the visible light range and into the far Infrared.
Special lenses are used in the lab that can transmit UV light. THey are quite pricey.
There are a variety of cameras used in the lab that detect UV to Infrared.
Check spectral transmission of the glass, the Bayer filter on the sensor, as well as the spectral sensitivity of the sensor itself.
In brief:
UV detection is distinct from the fluorescence that is elicited by UV. Fluorescence is traditionally defined as light that is elicited by excitation of an object with shorter wavelengths, and emitted as longer wavelengths. The most commonly emitted fluorescence may vary from slightly longer wavelength fluorescence, through the visible light range and into the far Infrared.
Special lenses are used in the lab that can transmit UV light. THey are quite pricey.
There are a variety of cameras used in the lab that detect UV to Infrared.
Check spectral transmission of the glass, the Bayer filter on the sensor, as well as the spectral sensitivity of the sensor itself.
Sep 2, 2021 15:30:09 #
Brian in Whitby
Loc: Whitby, Ontario, Canada
hjkarten wrote:
Many mammals, including mice, birds, fish, and many invertebrates have photoreceptors that detect UV. Humans do not have detectors sensitive in the UV range.
Humingbirds have UV sensetive cones. In additional to seeing the UV they can also see on spectral colours As a result of the simultaneous stimulation of the UV sensetive cones and the red, green or blue sensetive cones. What a rich colour vision they must have!
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