Tuesday, November 12, 2013

Treasury flower - Gazania rigens in deep reflected ultraviolet photography, simulated butterfly and bee vision V

Today more about my last surviving Gazania flower Treasury flower - Gazania rigens in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter as well as my XBV filters for simulating bee and butterfly vision. Lens used was the 94mm CERCO quartz fluorite lens. Light source was a modified for UV high power Xenon flash.

[click on image to see a larger one]

Visible light image using UV/IR cut filter:
 

UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):
 

Simulated butterfly vision (UV - VIS) using XBV4 filter:
 

Simulated bee vision (UV - VIS) using XBV6 filter:
 

Simulated bee vision (UV - VIS) using XBV5 filter:
 

Infrared light image using IR filter:
 

Quadriptych of some of the above:
 


Interesting to notice also here, how the visible details change when the used wavelength gets shorter and the then appearance of unique colors when the butterfly and bee vision filters are applied. The outer petals reflect strongly UV around 370nm, there are also highly reflecting marks inside around a dark UV center and all that gets nicely visible, which I have also previously shown.

There is a Part IV about this same flower using filter stacks HERE.
There is a Part VI about this 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

Treasury flower - Gazania rigens in deep reflected ultraviolet photography, simulated butterfly and bee vision IV

Today about my last surviving Gazania flower Treasury flower - Gazania rigens in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter as well as my XBV filters for simulating bee and butterfly vision, but this time additionally also the Jupiter-U (280-385nm, eff. 365nm) and Saturn-U (300-350nm, eff. 325nm) filters. Lens used was the 94mm CERCO quartz fluorite lens. Light source was a modified for UV high power Xenon flash.

[click on image to see a larger one]

Visible light image using UV/IR cut filter:
 

UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):
 

UV image using Jupiter-U filter (approx. 280-385nm, effective peak approx. 365nm):
 

UV image using Saturn-U filter (approx. 300-350nm, effective peak approx. 325nm):
 

UV image using Deep UV filter (approx.300 - 315nm, effective peak approx. 308nm):
 

Simulated butterfly vision (UV - VIS) using XBV3 filter:
 

Polyptych of the above:
 


Interesting to notice, how the visible details change when the used wavelength gets shorter and the then appearance of unique colors. The outer petals reflect strongly UV around 370nm, there are also highly reflecting marks inside around a dark UV center and all that gets nicely visible, which I have also previously shown.

There is a Part III about this same flower using filter stacks 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

Old 105mm + 75mm enlarger lenses for reflected ultraviolet photography

Today about some older, quite capable UV transmitting enlarger lenses. I'm using a Gazania rigens flower for that test as well as my "work horse" UV filter, the Baader-U filter. Lenses used were older 75mm and 105mm enlarger lenses of dialyte construction. Light source was Xenon light. All shots were done at f11.

[click on image to see a larger one]

Diptych image using 75mm lens, Visual and reflected UV using Baader-U filter (approx. 320-395nm, peak approx. 350nm):
 

Diptych image using 105mm lens, Visual and reflected UV using Baader-U filter (approx. 320-395nm, peak approx. 350nm):
 

Diptych image 75mm vs. 105mm lens, both reflected UV using Baader-U filter:
 

The comparison images clearly show that the 75mm has an edge over the 105mm lens in terms of UV tramsission, but also in terms of sharpness. Both lenses are nevertheless quite capable, despite their 50++ years of age.
P.S.: The visualy images were not re-adjusted in focus, to show the small focus shift between VIS and UV.

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