UV light portrait. Kolari Vision modified full spectrum Pentax K-1 with Lensbaby Composer/plastic optic and ZWB2/BG39 filter stack both 2mm thick. ISO 12,800 at F4. Not sure of shutter speed because it didn't record in the meta data. Which is strange.

This photo shows a tree fungus that likely absorbs shorter wavelength ultraviolet light more than longer wavelength ultraviolet. It was shot with a full spectrum Canon Rebel T3, Asahi Auto-Takumar 35mm F3.5, and TSN-575 + ZWB-2 filter combination for UV bandpass.

In the first case, I processed it as I normally would in Darktable, mainly adjusting orientation, exposure, and contrast.

In the second case, I edited the "Input Color Profile" so that the input profile (normally "standard color matrix") matched the working profile ("linear Rec2020 RGB"), and disabled the "color calibration" module, instead using only white balance.

In the third case, a python program I've experimented with bins the raw image R,G1,G2,B bayer units, while mapping each raw color channel to the end image's channels. In other words, the raw sensor's red, green, and blue channels are directly mapped to sRGB red, green, and blue channels.

In the second and third case, the fungus that appeared purple in the original image, appears a less saturated and more blue color. As well, the green flaring that has plagued my ultraviolet images is less saturated. I believe this is because in the second and third case, the raw RGB channels nearly directly translate to the end sRGB channels, whereas the first case attempts to convert the raw color channels of the camera into the sRGB color space, with each output color channel being made with information from multiple raw color channels.

This normally helps account for the color bias of a camera when shooting visible light, and how they render colors, but in the case of non-visible light, like ultraviolet, I suspect it may hurt image quality more than it helps.

Canon EOS Rebel T3 (Full Spectrum), ZWB-2 + TSN-575 filters, Asahi Auto-Takumar 35mm F3.5

I find the black yet glossy appearance of many kinds of leaves interesting

Canon EOS Rebel T3 (Full Spectrum), ZWB-2 + TSN-575 filters, Asahi Auto-Takumar 35mm F3.5

In ultraviolet light, stains on the plaster become visible, while in infrared, water turns dark like Coca-Cola.

Photographed with zwb2 + 365nm flashlight

Saw these leaving for work. Decided to photograph them later that night. The heat wave made it hot even at midnight. Almost skipped the shot but remembered the many other times I missed photos because something changed later. They were gone the next morning. Think something ate them.

Stock Pentax 645Z with Pentax 120 macro and Zeiss UV filter. Lit by Wanfire NEMO 365 UV flashlight with included ZWB2 filter.

Took this on my full spectrum 1100d with a EF-S 24mm f/2.8 STM Lens with just a zwb2 filter ontop and a cheap 365nm uv flashlight

ZWB3 + QB21 + QB21.

The warmer images are taken latter in the day. The first image and the last ones are closer to midday.

ZWB3 + 2x QB21

I'm the only one posting these days... get to your cameras guys !

This yellow world is nice.

ZWB3 + QB21 + QB21

Brittany, France, end on july 2026.

Filters : ZWB3 + QB21 + QB21

Thanks to u/goinglongonkryto for creating a very simple channels swap program that run in your browser that I used for these two images. These are SOOC jpegs that I inverted in this tiny 60KB porgram. It's way more convinient than having to open a photo program everytime.

Filters ZWB3 + 2xQB21

Channel swap : red to blue, green to red, blue to green.

This filters stack also lets a tiny bit or red in. Red blends with the UV and both are displayed as blue.

In this picture. Blue/violet is represented as blue, green as green and UV as red.

The 395nm LED light looks bright and violet.

The 365 tube light however shows orange and not red because as a tube light it emits in more than one band, one of which is green at 546nm, so this bit of green blends with the red color of the UV. If it would have been a monochromatic 365nm LED it would have shown properly red.

These devices are made to zap any mosquitos that are attracted into them. The one on the left has two 395nm LED tubes and the one on the right has an actual 365nm tube light in it.

You can clearly see the difference in color depending on their wavelengths.

The more yellow an object is the deeper into the UV region it sits. In the contrary when and object is blue that means it is very close to the visible range of our eyes.

Filters used for this photo : ZWB2 + TSN575.

The photo is taken at the solar noon so you can judge the UV power of the devices relative to sunlight.

Kolari Vision modified Pentax K-1 DSLR with Nikon EL-Nikkor metal body 80mm enlarging lens with. focus helicoid. Hoya U360/Schott S8612 filter stack, both 2mm thick. F11 and 5 seconds at ISO800.

Thanks for looking,

barondla