Wednesday, July 17, 2019

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

Today shots of that long blooming spring flower hybride 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 a new alternative XSP filter, and my XBV filters for simulated bee and butterfly vision. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was sunlight and a little help from my Nichia 365nm UV LED.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Alternative colorful reflected UV filtering:
 

Simulated butterfly vision:
 

Simulated bee vision:
 

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

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

Bidens has a strong visible UV pattern, its petal tips are UV bright around 365nm, its center is quite UV dark, so this gets quite nicely visible in simulated butterfly and bee vision, also using that standard UV (Baader U) and new alternative reflected UV filter which delivers rather colorful UV images.

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

Tuesday, July 2, 2019

Cobweb house-leek flower - Sempervivum arachnoideum in reflected ultraviolet photography and simulated bee and butterfly vision II

Today more shots of a Cobweb house-leek flower - Sempervivum arachnoideum 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 Xenon 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 butterfly and bee vision (left to right, top to bottom):
 

Sempervivum flowers have a distinct UV reflection, their petals have a dark center center line, the outside part is UV darker and all this gets nicely visible here, also in simulated bee and butterfly vision.

I have posted about this flower before HERE

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