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UltravioletPhotography

Canis familiaris [Domestic Dog]


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Stefano (2021) Canis familiaris Linnaeus, 1758[2] (Canidae) Domestic Dog. Dog photographed in ultraviolet and infrared light. LINK

 

Camera: Full-spectrum Canon EOS M

Lens: Soligor 35 mm f/3.5

Filters:

UV: ZWB2 (2 mm) + Chinese BG39 (2 mm)

IR: Hoya R72

 

The first images are UV:

 

f/4(?), ISO 6400, 1/30 s exposure (repost from here):

post-284-0-40975300-1619217637.jpg

 

f/4(?), ISO 6400, 1/30 s exposure

post-284-0-89733900-1619217789.jpg

 

f/(?), ISO 25600, 1/15 s exposure

post-284-0-85155900-1619217875.jpg

 

f/(?), ISO 3200, 1/30 s exposure. A bit out of focus, but I like it:

post-284-0-71459300-1619217944.jpg

 

These last two are IR:

 

f/(?), ISO 100, 1/60 s exposure

post-284-0-52457200-1619218017.jpg

 

f/(?), ISO 400, 1/500 s exposure. Starting with the raw image, I increased the saturation to the max in Photo Ninja. Then saved it as a .jpg, opened it in IrfanView, increased the saturation to the max again, and swapped the red and blue channels (BGR).

post-284-0-20774700-1619218122.jpg

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Red parts of animal bodies (his eyes, which are reddish, his tongue, as well as my lips) are UV-yellow. Maybe blood, in a thin layer, is UV-yellow.
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Red parts of animal bodies (his eyes, which are reddish, his tongue, as well as my lips) are UV-yellow. Maybe blood, in a thin layer, is UV-yellow.

And sure enough... according to this source, the absorption of oxygenated hemoglobin in water has a low at 368 nm. We can argue about the precise hue 368 nm has in UV (and still, it is a broad peak), but often if not always it is a shade of yellow. Our blood is dark yellow in UV, or so it seems.
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Very nice to see these dog images. I love how his nose looks in IR.

 

And what is Dog's name??

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So he is white in UV, visible and IR?

Thats interesting.

Yes. In UV he is just slightly lavender, so in UVB he is probably a bit darker, but he is reflective in all wavelengths.
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Yes. In UV he is just slightly lavender, so in UVB he is probably a bit darker, but he is reflective in all wavelengths.

 

So not like a polar bear or juvenile harp seal. Not all white fur is really white, evidently.

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He is lavender! Interesting. The ears are a big darker which is cute.

 

Does Sugar have dark skin under his white coat?

What kind of dog is this?

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He has brownish spots that look darker in UV. His skin is both pink and black, when his nose is wet you can see the black/pink spots underneath.

 

He is similar to a Sicilian shepard, translating from Italian, but he is not from a pure breed.

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