Thursday, June 3, 2021

Apache beggarticks - Bidens ferulifolia in reflected ultraviolet photography as moving GIF XX

Today in 2021 more about that long blooming spring flower Apache beggarticks - Bidens ferulifolia in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f11 in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was a modified for high UV output Studio flash.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Animated Gif image to show that invisible pattern (need to click):
 

Bidens has a strong visible UV "bullseye" pattern, its petal tips are UV bright around 365nm, its center is quite UV dark, so this gets quite nicely visible, also in this animated Gif-Image. 

I have written about Bidens previously HERE
 
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Wednesday, June 2, 2021

Apache beggarticks - Bidens ferulifolia in reflected ultraviolet photography, simulated bee and butterfly vision XIX

Today in 2021 more shots of a long blooming spring flower Apache beggarticks - Bidens ferulifolia in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f11 in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as my XBV filters for simulated bee and butterfly vision. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was a modified for high UV output Studio flash.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Simulated butterfly vision:
 

Simulated bee vision:
 

Quadriptych (details) of human vision, UV, simulated bee and butterfly vision (left to right, top to bottom):
 

Bidens has a strong visible UV "bullseye" pattern, its petal tips are UV bright around 365nm, its center is quite UV dark, so this gets quite nicely visible, also in simulated butterfly and bee vision.

Here I was testing a new black backdrop, as it is rather difficult to find materials which really are "UV black", but this Japanese material seems to work very well, with approx. 0.7% reflection from UV to IR!

I have written about Bidens previously HERE
 
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Friday, April 23, 2021

Cliff maids - Lewisia cotyledon in reflected ultraviolet photography, simulated bee and butterfly vision VI

Today in 2021 more closeup shots of a pink long blooming, perennial spring flower Cliff maids - Lewisia cotyledon in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f11 in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as my XBV filters for simulated bee and butterfly vision. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was Xenon light from my UV enhanced studio flash.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Simulated butterfly vision:
 

Simulated bee vision:
 

Quadriptych of human vision, UV, simulated bee and butterfly vision (left to right, top to bottom):
 

Lewisia has a visible UV pattern, its petal tips are UV bright around 385nm, its center is UV dark, so this gets quite nicely visible, also in simulated butterfly and bee vision.

I have written more about that flower HERE
 
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Saturday, April 17, 2021

Apache beggarticks - Bidens ferulifolia in reflected ultraviolet photography, simulated bee and butterfly vision XVIII

Today in 2021 shots of a long blooming spring flower Apache beggarticks - Bidens ferulifolia in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f8 in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as my XBV filters for simulated bee and butterfly vision. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was sunlight.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Simulated butterfly vision:
 

Simulated bee vision (new version):
 

Quadriptych (details) of human vision, UV, new simulated bee and butterfly vision (left to right, top to bottom):
 

Bidens has a strong visible UV "bullseye" pattern, its petal tips are UV bright around 365nm, its center is quite UV dark, so this gets quite nicely visible, also in simulated butterfly and bee vision.

I have written about Bidens previously HERE
 
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Monday, April 5, 2021

Cliff maids - Lewisia cotyledon in reflected ultraviolet photography, simulated bee and butterfly vision V

Today in 2021 first closeup shots of a long blooming, perennial spring flower Cliff maids - Lewisia cotyledon in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f11 in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as my XBV filters for simulated bee and butterfly vision. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was Xenon light from my UV enhanced studio flash.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Simulated butterfly vision:
 

Simulated bee vision:
 

Quadriptych of human vision, UV, simulated bee and butterfly vision (left to right, top to bottom):
 

Lewisia has a visible UV pattern, its petal tips are UV bright around 385nm, its center is UV dark, so this gets quite nicely visible, also in simulated butterfly and bee vision.

I have written more about that flower HERE
 
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Sunday, March 21, 2021

Moth orchid - Phalaenopsis in reflected ultraviolet photography and simulated butterfly and bee vision using a UV-Nikkor 105mm lens II

Today in March 2021 studio shots of a decorative flower, Moth orchid - Phalaenopsis in reflected ultraviolet photography using my "work horse" UV filter as well as simulated bee and butterfly vision  shot with my "work horse" UV-Nikkor f4.5/105mm quartz fluorite lens. UV filter used was the Baader-U filter, my "work horse" filter for reflected UV as well as my proprietary XBV filters for simulated bee and butterfly vision. All shots were done at f11. Light source used was a modified for high UV output Xenon flash. I have additionally used a 365nm UV LED for better focusing.

[click on image to see a larger one]

Human Vision (VIS):
 

Reflected UV (Baader-U):
 

Simulated Butterfly Vision:
 

Simulated Bee Vision:
 

Quadriptych of human vision, UV, simulated butterfly and bee vision (left to right, top to bottom):
 

This orchid has not a very specific UV pattern, its petals are UV reflective around 380nm, but its middle tip (column and gymnostemium) have a rather UV bright spot reflecting around 370nm which gets nicely visible.

The UV-Nikkor 105mm lens is known to be a very well working one, with a nice close up 1:2 focus capability from infinity up to 48cm (0.48 meter). Sharpness is very good and so is contrast, even from f4.5 onwards. With a Nikon PN-11 extension tube of 52.5mm length it reaches 1:1 (1x) magnification. It has the standard Nikon-F mount, and it covers full format sensors (41mm image diameter). It is defined to reach down to 190nm and up to 1300nm in near infrared; my measured transmission spectra of it may be seen here.

I have written more about this orchid HERE

Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Oncostele Wildcat 'Golden Red Star' in visible, reflected UV, simulated bee and butterfly vision using a UV-Nikkor 105mm lens V

Today in March 2021 even more shots of an Orchid hybride, Oncostele Wildcat 'Golden Red Star' in reflected ultraviolet photography as well as simulated bee and butterfly vision  shot with my "work horse" UV-Nikkor f4.5/105mm quartz fluorite lens. UV filter used was the Baader-U filter, my "work horse" filter for reflected UV as well as my proprietary XBV filters for simulated bee and butterfly vision. All shots were done at f11. Light source used was a modified for high UV output Xenon flash. I have additionally used a 365nm UV LED for better focusing.

[click on image to see a larger one]

Human Vision (VIS):
 

Reflected UV (Baader-U):
 

Simulated Butterfly Vision:
 

Simulated Bee Vision:
 

Quadriptych of human vision, UV, simulated butterfly and bee vision (left to right, top to bottom):
 

This orchid has a very specific UV pattern, its petals are very UV dark, but its lower petal lip shows on the lower center a very UV bright spot which gets nicely visible.

PS: The San Diego Botanic Garden will in their "World of Orchids" show April 3 - May 2, 2021 display these Oncostele "Wildcat" multispectral images, to explain how orchids and pollinators interact.

The UV-Nikkor 105mm lens is known to be a very well working one, with a nice close up 1:2 focus capability from infinity up to 48cm (0.48 meter). Sharpness is very good and so is contrast, even from f4.5 onwards. With a Nikon PN-11 extension tube of 52.5mm length it reaches 1:1 (1x) magnification. It has the standard Nikon-F mount, and it covers full format sensors (41mm image diameter). It is defined to reach down to 190nm and up to 1300nm in near infrared; my measured transmission spectra of it may be seen here.

I have written more about this orchid HERE

Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos