Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision VI

Today in 2021 shots of a beautiful flower, originating from the USA Prairie, a Black-eyed Susan - Rudbeckia fulgida in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as in simulated bee and butterfly vision using my XBV filters. All shots were done at f8. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was sunlight (shade).

[click on image to see a larger one]

Human vision:
 

Reflected ultraviolet (UV):
 

Simulated butterfly vision:
 

Simulated bee vision:
 

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

This flower shows a very prominent UV bullseye pattern, as its petal tips are very UV bright (around 365nm) and its center is very UV dark, and all this gets nicely visible, also in simulated bee and butterfly vision.

I have previously written 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

Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision V

Today in 2020 shots of a beautiful flower, originating from the USA Prairie, a Black-eyed Susan - Rudbeckia fulgida in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as in simulated bee and butterfly vision using my XBV filters. All shots were done at f8. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was sunlight (shade).

[click on image to see a larger one]

Human vision:
 

Reflected ultraviolet (UV):
 

Simulated butterfly vision:
 

Simulated bee vision:
 

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

This flower shows a very prominent UV bullseye pattern, as its petal tips are very UV bright (around 365nm) and its center is very UV dark, and all this gets nicely visible, also in simulated bee and butterfly vision.

I have previously written 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

Black-Eyed-Susan - Rudbeckia fulgida: HDTV video in human vision and simulated bee vision

Today video shots of a famous "UV-flower" Black-Eyed-Susan - Rudbeckia fulgida in human and simulated bee vision. All shots were done at f5.6 in visual  videography and using my XBV filter for simulated bee vision. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was sunlight.

[click on image to see a larger one]

Human vision (VIS):
 

Simulated bee vision (BV):
 

And now VIS and BV HDTV videos shot in parallel of a selected flower with pollinating bees:
Black-Eyed-Susans have a distinct UV reflection "bulls eye" pattern, its petals have a quite UV dark center (visible as green in simulated bee vision) and the outside part is quite UV bright around 365nm (visible as bright yellow in sim. bee vision). All this gets nicely visible, also in simulated bee vision as well as in the HDTV videos.

I have written about that flower before 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

Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision IV

Today more shots of a famous "UV-flower" Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f5.6 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:
 

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

Black-Eyed-Susans have a distinct UV reflection "bulls eye" pattern, its petals have a quite UV dark center and the outside part is quite UV bright around 365nm and all this gets nicely visible, also in simulated bee and butterfly vision.

I have written about that flower before 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

Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision III

Today even more shots of that famous "UV-flower" Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f5.6 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:
 

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

Black-Eyed-Susans have a distinct UV reflection "bulls eye" pattern, its petals have a quite UV dark center and the outside part is quite UV bright around 365nm and all this gets nicely visible, also in simulated bee and butterfly vision.

I have written about that flower before 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

Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision II

Today more shots of a famous "UV-flower" Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f5.6 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:
 

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

Black-Eyed-Susans have a distinct UV reflection "bulls eye" pattern, its petals have a quite UV dark center and the outside part is quite UV bright around 365nm and all this gets nicely visible, also in simulated bee and butterfly vision.

I have written about that flower before 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

Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision

Today shots of a famous "UV-flower" Black-Eyed-Susan - Rudbeckia fulgida in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f5.6 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:
 

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

Black-Eyed-Susans have a distinct UV reflection "bulls eye" pattern, its petals have a quite UV dark center and the outside part is quite UV bright around 365nm and all this gets nicely visible, also in simulated bee and butterfly vision.

I have written about that flower before 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

Orange coneflower - Rudbeckia fulgida in reflected deep ultraviolet photography and simulated butterfly and bee vision XIV

Today studio shots of a decorative summer flower which I had still blooming on my balcony, Orange coneflower - Rudbeckia fulgida in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as in simulated butterfly and bee vision using my proprietary XBV filters. Lens was my UV-Nikkor 105mm quartz flourite lens. All shots were done at about f8. Light source was a modified Xenon flash, background was a dark gray. [These shots were done with a new camera system and are available on request in very high resolution (40 and 60 Mp)]

[click on image to see a larger one]

Visible light image
 

UV image using Baader-U filter:  

Simulated butterfly vision image:  

Simulated bee vision image:  

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

This attractive flower shows its very prominent UV bullseye pattern, its petals have an UV dark bottom and very UV bright tips (around 365nm), invisible to us humans, and all this gets nicely visible also in simulated butterfly and bee vision.

I have written about that flower before HERE.

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

How to stand out in the crowd - Gazania rigens shows its ecologic advantage vs Rudbeckia fulgida and Rudbeckia hirta using intense UV reflection IV

Today about how even some UV reflecting flowers (Gazania rigens) have achieved a competitive edge over other UV reflecting flowers (Rudbeckia fulgida) by making use of a specific very intense UV reflection around 370nm. This will be shown in human vision, in reflected ultraviolet photography and also by using reflection spectrometry. I was using my "work horse" UV filter, the Baader-U filter for reflected UV and a calibrated UV-VIS USB2000 spectrometer with stabilized Xenon lightsource.

[click on image to see a larger one]

Rudbeckia fulgida + R. hirta vs white Gazania rigens, visible image:  

Rudbeckia fulgida + R. hirta vs white Gazania rigens, reflected UV image:  

Reflection spectrometry result of Rudbeckia fulgida vs white Gazania rigens (UV bright petal tip):  

In visible light, all these flowers are rather bright yellow / orange (Rudbeckia) and white (Gazania) to our human eye. But the white Gazania rigens compared to the Rudbeckia fulgida flower shows an even more prominent and bright bullseye pattern in reflected UV (only visible to bees and butterflies), as its outer petals are very UV bright (around 370nm) with a UV reflection above 60%, compared to the other UV reflecting flower with only about 10% UV reflection of its petal tips, which makes this Gazania clearly even more visible in UV, hence creating an impressive competitive edge in terms of chances for getting pollinated even against those other flowers with UV bullseye pattern - and all this gets nicely visible.

I have written HERE about it before.

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

Summer UV flower potpourri in reflected ultraviolet photography and simulated bee vision

Today studio images of a summer flower potpourri, all exhibiting UV patterns, shot in reflected ultraviolet photography and simulated bee and butterfly vision. Flowers shown are: Rudbeckia fulgida, Gazania rigens, Sanvitalia procumbens and Bidens ferulifolia. 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. This used butterfly vision simulating filter is a new development of mine. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was a modified Xenon flash, background was a dark gray. [These shots were done with a new camera system and are available on request in very high resolution (40 and 60 Mp)].

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Simulated butterfly vision:
 

Simulated bee vision:
 

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

These flower outer petals reflect UV strongly, contrasting against its UV dark center, all invisible to us humans, but all this gets nicely visible, also in simulated bee and butterfly vision.


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

How to stand out in the crowd - Gazania rigens shows its ecologic advantage vs Rudbeckia fulgida and Rudbeckia hirta using intense UV reflection III

Today about how even some UV reflecting flowers (Gazania rigens) have achieved a competitive edge over other UV reflecting flowers (Rudbeckia fulgida and R. hirta) by making use of a specific very intense UV reflection around 370nm. This will be shown in human vision, in reflected ultraviolet photography and also in simulated bee vision. I was using my "work horse" UV filter, the Baader-U filter for reflected UV, my XBV filter for simulated bee vision aside from a visible light shot. Lens was my UV-Nikkor 105mm quartz flourite lens. Light source was a modified Xenon flash. All shots were done at f11. [These shots were done with a new camera system and are available on request in very high resolution (40 and 60 Mp)].

[click on image to see a larger one]

Rudbeckia fulgida + R. hirta vs white Gazania rigens, visible image:  

Rudbeckia fulgida + R. hirta vs white Gazania rigens, reflected UV image:  

Rudbeckia fulgida + R. hirta vs white Gazania rigens, simulated bee vision image:  

In visible light, all these flowers are rather bright yellow / orange (Rudbeckia) and white (Gazania) to our human eye. But the white Gazania rigens against the Rudbeckia fulgida and R. hirta flowers shows an even more prominent and bright bullseye pattern in reflected UV (only visible to bees and butterflies), as its petals are very, very UV bright (around 370nm) and its center is very UV dark, compared to the other UV reflecting flowers, which makes them clearly even more visible in UV, hence creating an impressive competitive edge in terms of chances for getting pollinated even against those other flowers with UV bullseye pattern - and all this gets nicely visible, also in simulated bee vision.

I have written HERE about it before.

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

How to stand out in the crowd - Rudbeckia fulgida and Zinnia haageana show its ecologic advantage using intense UV reflection II

Today more about how some yellow flowers (Rudbeckia fulgida and Zinnia haageana) have achieved a competitive edge over other yellow flowers (Coreopsis verticillata in this case) by making use of a specific intense UV reflection around 365nm, matched to the insect eyes UV sensitivity. This will be shown side-by-side in human vision and also in reflected ultraviolet photography. I was using my "work horse" UV filter, the Baader-U filter for reflected UV, aside from a visible light shot. Lens was my UV-Nikkor 105mm quartz flourite lens. Light source was sunlight. All shots were done at f8.

[click on image to see a larger one]

Diptych Rudbeckia fulgida vs Coreopsis verticillata overview, visible image (left) and reflected UV image (right):  

Diptych Rudbeckia fulgida vs Coreopsis verticillata detail, visible image (left) and reflected UV image (right):  

Diptych Zinnia haageana vs Coreopsis verticillata, visible image (left) and reflected UV image (right):  

Diptych Zinnia haageana vs Coreopsis verticillata, visible image (left) and reflected UV image (right):  

In visible light, all these flowers are rather bright yellow / orange to our human eye. But this Rudbeckia fulgida and Zinnia haageana flower shows a very prominent and bright bullseye pattern in reflected UV (only visible to bees and butterflies), as their petals are very UV bright (around 350-365nm) and their center is very UV dark, compared to the rather UV non-reflecting other flowers, which makes them nearly invisible in UV, hence creating an impressive competitive edge in terms of chances for getting pollinated - and all this gets nicely visible.

I have written HERE about it before.

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