Wednesday, July 31, 2013

Mexican Zinnia - Zinnia haageana in reflected ultraviolet photography simulated bee and butterfly vision XI

Today shots using that decorative flower, a Zinnia haageana - Mexican Zinnia in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U and a UV/IR Cut filter for the visible light shots as well as my XBV filters for simulated bee and butterfly vision. Lens was my CERCO 94mm quartz flourite lens. Light source was Xenon flash. All shots were done at about f4.1 (fully open).

Since my readers are meanwhile used to the colors my different filters make, I leave it today to the reader to decode those ....

[click on image to see a larger one]

 

 

 

 

 

 

 


Mexican Zinnia flowers have a very specific UV pattern as this last picture clearly shows (reflected UV using Baader-U filter). Their petals are very UV dark on the middle and bottom, but their petal tips are very UV bright, reaching much deeper into UV as any other flower I know (< 345nm), and some like this one here even shows different UV reflections on underside and upperside of their petals - and all this gets nicely visible in this presentation.

I have written previously about these flowers 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, July 24, 2013

Orange Coneflower - Rudbeckia fulgida in reflected ultraviolet photography soft focus

Today about a question I carry around with me for long: "Is sharpness everything?" So here "pictorial" shots of a very decorative flower,Orange Coneflower - Rudbeckia fulgida in reflected ultraviolet soft focus photography using my "work horse" UV filter, the Baader-U and a UV/IR Cut filter for the visible light shots. Lens was a self made lens with quartz elements. Light source was sunlight. All shots were done with variable soft focus settings, SF0 - SF3.

All diptych images show left results using UV/Cut filter for the visible shots and right using the Baader-U filter (approx. 320-395nm, peak approx. 350nm) for the reflected UV shots.

[click on image to see a larger one]

 

 

 

 

Quadriptychs for comparison, first VIS then UV:
 

 


So, I have used variable soft focus settings, SF0 - SF3 and show the results in VIS and UV, the latter showing the prominent UV pattern this beautiful flower has, and all this gets nicely visible in this side-a-side presentation.

I have written previously about soft focus photography 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, July 22, 2013

Mexican Zinnia - Zinnia haageana in reflected ultraviolet photography X

Today different shots of those very decorative flowers, various types of Zinnia haageana - Mexican Zinnia in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U and a UV/IR Cut filter for the visible light shots. Lens was my CERCO 94mm quartz flourite lens. Light source was sunlight. All shots were done at about f4.1 (fully open).

All diptych images show left results using UV/Cut filter for the visible shots and right using the Baader-U filter (approx. 320-395nm, peak approx. 350nm) for the reflected UV shots.

[click on image to see a larger one]

 

 

 

 

 

 

 

 

Mexican Zinnia flowers have a very specific UV pattern. Their petals are very UV dark on the middle and bottom, but their petal tips are very UV bright, reaching much deeper into UV as any other flower I know (< 345nm), and all this gets nicely visible in this side-a-side presentation.

I have written previously about these flowers 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, July 21, 2013

[UV] Old Achromatic Quartz Fluorite Lens for Ultraviolet Photography (VI)

Today a bit different reflected ultraviolet photography shots, as I tried to work with more open aperture, using that old achromatic quartz fluorite lens, that I have rescued from an older spectrometer system also using my "work horse" UV filter, the Baader-U filter (approx. 320-395nm, peak approx. 350nm) with some Zinnia haageana flowers. Light source was afternoon sunlight.

[click on image to see a larger one]

Diptych form VIS , UV for comparison.

 

 

 

 

Here, the idea was to show not only that unique UV pattern this flower has, contrary to what we see (or don't see) in visible light, but this time with a bit "artsy" touch using wider open aperture and playing with DOF. All that gets nicely visible I think.

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, July 17, 2013

[UV] Old Achromatic Quartz Fluorite Lens for Ultraviolet Photography (V)

Today even more reflected ultraviolet photography shots using that old achromatic quartz fluorite lens, that I have rescued from an older spectrometer system also using my "work horse" UV filter, the Baader-U filter (approx. 320-395nm, peak approx. 350nm) with a Zinnia haageana flower. Light source was a Xenon flash system.

[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, peak approx. 350nm):
 

Diptych form for better comparison:
 

Here, the idea was to show not only that unique UV pattern this flower has, but to also show how that might look like for the somewhat blurry vision a bee has for flowers in further distance (flower in the background). Still the background flowers are noticeable through their unique UV pattern, albeit not as sharp as the one closeup. All that gets nicely visible 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

[UV] Old Achromatic Quartz Fluorite Lens for Ultraviolet Photography (IV)

Today more reflected ultraviolet photography shots using that old achromatic quartz fluorite lens, that I have rescued from an older spectrometer system also using my "work horse" UV filter, the Baader-U filter (approx. 320-395nm, peak approx. 350nm) with a Zinnia haageana flower. Light source was a Xenon flash system. All shots were done with variated aperture settings (+1 stop difference per image) to show that influence.

[click on image to see a larger one]

 

 

 

 

Quadriptych form for better comparison:
 

So, I guess the idea gets clear to get some softness into the image, yet preserve the structure of the flower and especially its unique UV pattern. And that gets nicely visible 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 16, 2013

[UV] Old Achromatic Quartz Fluorite Lens for Ultraviolet Photography (III)

Today reflected ultraviolet photography shots using an old achromatic quartz fluorite lens, that I have rescued from an older spectrometer system also using my "work horse" UV filter, the Baader-U filter (approx. 320-395nm, peak approx. 350nm). Light source was sunlight. All shots were done with variated aperture settings (+1 stop difference per image) to show that influence.

[click on image to see a larger one]

Quadriptych form for better comparison.
Zinnia haageana flower:
 

Sanvitalia procumbens flower:
 

Not that bad, especially since it has a very small focus shift of only about 1/2mm when shooting macro. That added telecompressor CaF2 lens of about 100mm speeds it up considerably, still allowing a very convenient working distance. The variable aperture allows to control the amount of softness that lens has, allowing for "artsy" shots.And of course it transmits flat beyond 300nm.

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, July 15, 2013

Rudbeckia fulgida - Orange Coneflower opening in reflected UV ultraviolet photography

Today shots of a very decorative flower, a Rudbeckia fulgida - Orange Coneflower in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter. Lens was a CERCO 94mm lens. Light source was sunlight. All shots were done at about f8.

[click on image to see a larger one]

Various stages of a Rudbeckia fulgida flower opening.

Visible light image using UV/IR Cut filter:  

UV image using Baader-U filter (approx. 320-395nm, peak approx. 350nm):  

Visible light image using UV/IR Cut filter:  

UV image using Baader-U filter (approx. 320-395nm, peak approx. 350nm):  

Visible light image using UV/IR Cut filter:  

UV image using Baader-U filter (approx. 320-395nm, peak approx. 350nm):  

Diptych form for better comparison:
 
 
 

Rudbeckia has a very prominent UV pattern, invisible to our human eye, UV bright petal tips reflecting around 365nm and quite UV dark middle / bottoms petals and flower center and all that gets nicely visible.


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, July 14, 2013

Mexican Zinnia - Zinnia haageana in reflected infrared photography IX

Today more different shots of those very decorative flowers, various types of Zinnia haageana - Mexican Zinnia but in reflected infrared photography using just a ND filter and a UV/IR Cut filter for the visible light shots. Lens was my CERCO 94mm quartz flourite lens. Light source was sunlight. All shots were done at about f8.

All diptych images show left results using UV/Cut filter for the visible shots and right a ND filter for the (mostly) reflected NIR shots.

[click on image to see a larger one]

 

 

 

 

 


Mexican Zinnia flowers have a very specific visible pattern that also somewhat washed out gets visible in the mostly NIR shots, and all this gets nicely visible in this side-a-side presentation.

I have written previously about these flowers in UV 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, July 10, 2013

Mexican Zinnia - Zinnia haageana in reflected ultraviolet photography VIII

Today different shots of very decorative flowers, various types of Zinnia haageana - Mexican Zinnia in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U and a UV/IR Cut filter for the visible light shots. Lens was my CERCO 94mm quartz flourite lens. Light source was sunlight. All shots were done at about f8.

All diptych images show left results using UV/Cut filter for the visible shots and right using the Baader-U filter (approx. 320-395nm, peak approx. 350nm) for the reflected UV shots.

[click on image to see a larger one]

 

 

 

 

 

 

 

 

 

 

 

 


Mexican Zinnia flowers have a very specific UV pattern. Their petals are very UV dark on the middle and bottom, but their petal tips are very UV bright, reaching much deeper into UV as any other flower I know (< 345nm), and all this gets nicely visible in this side-a-side presentation.

I have written previously about these flowers 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