Wednesday, April 18, 2012

Clematis human and bee vision UV ultraviolet photography

Today about a white clematis flower shot in UV using a Baader U (320-390nm) and a special Bee Vision filter, that allows to map UV as blue into an image so as to simulate what bees can see (UV, Blue, Green). Shot was done using a Cerco 94mm quartz fluorite lens.

[click on image to see a larger one]

Visual light shot (VIS):


Ultraviolet light (Baader U filter, 320-390nm):


Simulated Bee Vision (special filter, UV->Blue, Green, Red):


Triptych of those images above:


Note the dark center in the ultraviolet shot which is pertained also in the simulated bee (insect) vision shot.


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

Bidens ferulifolia, trichromatic human and bee vision UV ultraviolet photography

Today about a Bidens ferulifolia spring flower shot in UV using a Baader U (320-390nm) and a special Bee Vision filter, that allows to map UV as blue into an image so as to simulate what bees can see (UV, Blue, Green). Shot was done using a Cerco 94mm quartz fluorite lens.

[click on image to see a larger one]

Visual light shot (VIS):


Ultraviolet light (Baader U filter, 320-390nm):


Simulated Bee Vision (special filter, UV->Blue, Green, Red):


Triptych of those images above:


Note the dark center UV pattern which is also pertained in the bee vision shot and the UV bright outer petal part, which together create a very attractive nectar guiding "landing platform" for bees / insects.

Quite interesting what this all yellow (for us) flower looks like compared to what it does for a bee or insect.


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 16, 2012

[UV] Caltha palustris (Buttercup) flower in deep UV reflected ultraviolet photography

Today about a Caltha palustris (Buttercup, Marsh Marigold) spring flower shot in deep UV using a Baader U (320-390nm) and a special 300-350nm filter. Shot was done using a Cerco 94mm quartz fluorite lens.

[click on image to see a larger one]

The UV images here also uses my standardized false UV color normal + high intensity palette:



Visual light shot (VIS):


Ultraviolet light (Baader U filter, 320-390nm):


Ultraviolet light (special filter, 300-350nm):


Ultraviolet light (special filter, 300-350nm, different whitebalance):


It was too windy for that special filter, so I had to use high ISO, so the quality is not my usual one.

So exploring the world beyond 350nm goes on...


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, April 15, 2012

[UV] Taraxacum (Dandelion) flower in deep UV reflected ultraviolet photography

Today about a Taraxacum officinale (Dandelion) spring flower shot in deep UV using a Baader U (320-390nm) and a special 300-350nm filter. Shot was done using a Cerco 94mm quartz fluorite lens.

[click on image to see a larger one]

The UV images here also uses my standardized false UV color normal + high intensity palette:



Visual light shot (VIS):


Ultraviolet light (Baader U filter, 320-390nm):


Ultraviolet light (special filter, 300-350nm):


Ultraviolet light (special filter, 300-350nm, different whitebalance):


So exploring the world beyond 350nm goes on...


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] Pulsatilla (Pasque Flower) in reflected ultraviolet photography

Today about a Pulsatilla vulgaris flower shot in UV using a Baader U (320-390nm) filter. Shot was done using a Cerco 94mm quartz fluorite lens.

[click on image to see a larger one]

The UV image here also uses my standardized false UV color normal + high intensity palette:



Ultraviolet shot:


Visible shot (for comparison):



Nice details being revealed using reflected UV photography.


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] Lesser Celandine in deep UV reflected ultraviolet photography

Today about a Lesser Celandine spring flower shot in deep UV using a Baader U (320-390nm) and a a special 300-350nm filter. shot was done using a Cerco 94mm quartz fluorite lens.

[click on image to see a larger one]

The UV images here also uses my standardized false UV color normal + high intensity palette:



Visual light shot (VIS):


Ultraviolet light (Baader U filter, 320-390nm):


Ultraviolet light (special filter, 300-350nm):


Ultraviolet light (special filter, 300-350nm, different whitebalance):


So exploring the world beyond 350nm goes on...


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] Bidens ferulifolia in deep UV reflected ultraviolet photography

Today about a Bidens ferulifolia flower shot in deep UV using a Baader U (320-390nm) and a special 300-350nm filter. shot was done using a Cerco 94mm quartz fluorite lens. I have previously shot the same type Bidens here using my standard Baader U filter.

[click on image to see a larger one]

The UV images here also uses my standardized false UV color normal + high intensity palette:






So exploring the world beyond 350nm goes on...


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, April 14, 2012

[UV] White Clematis in deep UV - reflected ultraviolet photography

Today about a white Clematis flower shot in deep UV using a special 300-350nm filter. shot was done using a Cerco 94mm quartz fluorite lens. I have previously shot the same Clematis here using my standard Baader U filter.

[click on image to see a larger one]

This first shown UV image here also uses my standardized false UV color normal + high intensity palette:



1) using Baader U whitebalance:


2) different whitebalance (false UV color palette does not match then):



Quite interesting which details this flower reveals.


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, April 10, 2012

[UV] Mirablis jalapa in reflected ultraviolet light and deep UV

The astonishing Mirabilis jalapa in various wavebands, broadband UV using Baader U filter (320-390nm) and a special 300-350nm filter. Shots from last autumn.

VIS:


UV: Baader U2


UV: 300-350nm



The shorter the UV waveband used gets, the more details the flower reveals.


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 9, 2012

[UV] Light Source - Flower - Filter - Lens - Sensor: a simulation of reflected UV photography

Well, just some ideas that came into my mind quite a while ago, when I was thinking about the chain:
Light Source -> Flower -> Filter -> Lens ->Sensor

To simplify things, let's assume

a) the light source being sunlight or Xenon light, as they are quite similar in the interesting UV region 300-400nm.
b) the lens being a quartz fluorite lens with flat transmittance in the interesting UV region 300-400nm

[click on image to see a larger one]

So here graphs (normalized to unity) showing in this example
1) flower (Mexican Zinnia, UV reflective flower tip): green line
2) filter (Baader U filter 2"): blue line
3) sensor (Nikon D200 mod. with quartz glass internal filter): red line



now lets add what that flower looks like after having passed the filter (pink line)



and finally what that sensor records of that (cyan line)



btw. if a normal, but UV transmitting glass lens (Noflexar 35mm - yellowish line) is used between filter and sensor, then the result looks like that:



The simple laymans terms summary: This is what the flowers reflects (green line) and what the camera records of it (cyan line) through a Baader U filter and Noflexar 35mm lens:



The bad news is, that it will only be a bit better if a quartz fluorite lens is being used, but not substantially.



So in the first case the 320-390nm Baader U filter appears like a 372BP15 bandpass filter and in the second, better example, like a 365BP16 bandpass filter. This has nothing to do with the type or quality of the Baader U filter, but is caused only by the process chain it is used within!


***THESE ARE VERY SIMPLIFIED SIMULATIONS BARE SCIENTIFIC ACCURRACY, SO NO DECISION, JUST INSIGHT SHOULD BE BASED ON THAT***


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, April 7, 2012

[UV] Phalaenopsis flower at 300-350nm reflected UV ultraviolet photography

I have previously shown here, how the world looks like at 300-350nm. Now more how a flower (Phalaenopsis in that case) looks like at 300-350nm in reflected UV photography in comparison to using a Baader U filter (320-390nm) and in normal visible light.

[click on image to see a larger one]

Visible light:


UV: Baader U filter:


UV: 330-370nm:


UV: 300-350nm:


In the last 300-350nm shot, the colors denote: yellowish green is 330-345nm, blue is <325nm.

These triptychs will show the differences side-a-side:





The shorter the waveband used gets, the more details the flowers reveals.


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