Wednesday, May 29, 2024

My multispectral works at the Tokyo Polytechnic University Color Science and Art Center

Today about my works being used with my permission by professor Yasushi Noguchi of the Tokyo Polytechnic University in Japan who is the director of their new Color Science and Art Center, which was created to educate about about color. There is now an exhibit about animal color and vision and the difference to human vision, hence why they liked to show my works there.

https://photos.app.goo.gl/p7GPvQENfwSDn2qX6 

Those shown multispectral images of mine where shot in my studio with my "work horse" UV-Nikkor f4.5/105mm quartz fluorite lens using the Baader UV/IR Cut filter and my proprietary XBV filters for simulated bee + butterfly vision. Light source in studio used was a Xenon flash modified for high UV output outside.

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 8, 2024

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

Today in Spring 2024 more shots of a white long blooming, perennial 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 a modified studio flash.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

Simulated bee vision:
 

Simulated butterfly 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. 

But there is also a highly UV reflective area visible, formed by those shiny petals which is especially quite visible in UV! This has recently been discovered by Prof. (em) Klaus Lunau of the University of Duesseldorf, Germany and he has published about that in NATURE 2020 here: Lunau, K., Ren, ZX., Fan, XQ. et al. Nectar mimicry: a new phenomenon. Sci Rep 10, 7039 (2020). https://www.nature.com/articles/s41598-020-63997-3

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, February 3, 2024

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

Today in February 2024 some studio shots of a well known decorative flower, a white 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 Xenon flash modified for high UV output. 

[click on image to see a larger one]

Human Vision (VIS):
 

Reflected UV (Baader-U):
 

Simulated Bee Vision:
 

Simulated Butterfly Vision:
 

Quadriptych of human vision, UV, simulated bee and butterfly 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 surrounded by an UV-dark area which gets nicely visible.

The UV-Nikkor 105mm lens is known to be a very well working one for multispectral imaging w/o focus shift, with a nice 1:2 close up focusing capability from infinity up to 48cm (0.48 meter). Sharpness is very good and so is its 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

Thursday, January 25, 2024

Arrowwood - Viburnum bodnantense in reflected ultraviolet photography, simulated bee and butterfly vision

Today still in cold January 2024 shots of a blossoming Arrowwood - Viburnum bodnantense bush 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):
 

Arrowwood bush flowers have no distinct UV reflection pattern, but their stamen create a UV dark center important to attract UV seeing pollinators and this gets nicely visible here, also in simulated bee and butterfly vision.


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

Tuesday, December 26, 2023

Complete UV-IR Camera System for sale

I have here again a complete professionally full spectrum converted UV-VIS-NIR Olympus M5 MkII (with pixel shift technology 40/80MB) camera system for sale, including an UV-capable 80mm lens with neglectable focus shift, infinity to 0.6x focusing range (up to 1x with a short tube), Baader-U UV (320-380nm) transmission filter as well as a Schott (or equivalent) BG (for visual light) filter, magnetic filter holders plus Teflon white standard, which I would sell. Comes with instructions on how to do proper white balanced UV-photography. PM or email me in case of interest...

 
 
Other filters or modifications on request. If interested please drop me an email....

Thursday, December 7, 2023

My multispectral works in High Energy Physics presentation

Well, I never would have expected to see my work in a scientists presentation about most modern high energy particle theories in physics: The German Physicist Dr Michael Weinert has recently been using (with my permission of course) some of my multispectral works in his presentation on high energy particle physics! Source:  "Weinert COMEX7 2023".

Those shown multispectral images of mine where shot in my studio with my "work horse" UV-Nikkor f4.5/105mm quartz fluorite lens using the Baader UV/IR Cut filter and my proprietary XBV filters for simulated bee + butterfly vision. Light source in studio used was a Xenon flash modified for high UV output outside.

[click on image to see a larger one]

Visual image:


UV induced visible fluorescence using unfiltered commercial 365nm UV torch, no UV blocking:


UV induced visible fluorescence commercial 365nm UV torch, UV blocking:


UV induced visible fluorescence using Nichia 365nm UV torch, UV blocking:


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, June 23, 2023

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

Today in 2023 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