Stefano Posted April 23, 2021 Share Posted April 23, 2021 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): f/4(?), ISO 6400, 1/30 s exposure f/(?), ISO 25600, 1/15 s exposure f/(?), ISO 3200, 1/30 s exposure. A bit out of focus, but I like it: These last two are IR: f/(?), ISO 100, 1/60 s exposure 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). Link to comment
Andy Perrin Posted April 23, 2021 Share Posted April 23, 2021 Cute in all wavelengths. Link to comment
Stefano Posted April 23, 2021 Author Share Posted April 23, 2021 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. Link to comment
colinbm Posted April 24, 2021 Share Posted April 24, 2021 Nice dog & well behaved model. Link to comment
Stefano Posted April 24, 2021 Author Share Posted April 24, 2021 Nice dog & well behaved model.When he doesn't try to bite the lens... but he's a nice dog. Link to comment
Stefano Posted April 24, 2021 Author Share Posted April 24, 2021 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. Link to comment
Andrea B. Posted April 24, 2021 Share Posted April 24, 2021 Very nice to see these dog images. I love how his nose looks in IR. And what is Dog's name?? Link to comment
Stefano Posted April 24, 2021 Author Share Posted April 24, 2021 And what is Dog's name??Sugar. Link to comment
Andrea B. Posted April 24, 2021 Share Posted April 24, 2021 English Sugar or Zucchero? Link to comment
Stefano Posted April 24, 2021 Author Share Posted April 24, 2021 English Sugar or Zucchero?English Sugar. We actually gave him an English name. Link to comment
dabateman Posted April 24, 2021 Share Posted April 24, 2021 So he is white in UV, visible and IR?Thats interesting. Link to comment
Stefano Posted April 24, 2021 Author Share Posted April 24, 2021 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. Link to comment
OlDoinyo Posted April 24, 2021 Share Posted April 24, 2021 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. Link to comment
Stefano Posted April 25, 2021 Author Share Posted April 25, 2021 Another image, here the lavender color can be seen better: f/4(?), ISO 1600, 1/30 s exposure BGR version: Link to comment
Andrea B. Posted April 25, 2021 Share Posted April 25, 2021 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? Link to comment
Stefano Posted April 25, 2021 Author Share Posted April 25, 2021 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. Link to comment
Andy Perrin Posted April 25, 2021 Share Posted April 25, 2021 I honestly love the lavender one. Link to comment
Stefano Posted April 25, 2021 Author Share Posted April 25, 2021 I honestly love the lavender one.Thanks! Link to comment
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