Tuesday, December 4, 2012

Quartz fluorite len vs enlarger lens for reflected UV photography

Today about comparing a quartz fluorite lens with a conventional, but UV capable enlarger lens. I'm using a beautiful flower, Eucharis × grandiflora, also called Amazon Lily, for that as well as my "work horse" UV filter, the Baader-U filter and a Hamamatsu f3.5/50mm quartz fluorite lens as well as a 3.5/50mm 6e/4g enlarger lens,a Komuranon-S 3.5/50mm. Light source was an UV enhanced Xenon flash.

[click on image to see a larger one]
1) Quartz Fluorite lens:
visible light image:
 

"standard" UV image using Baader-U filter:
 

UV - VIS differential:
 

2) Enlarger lens:
visible light image:
 

"standard" UV image using Baader-U filter:
 

UV - VIS differential:
 

This flower does not have a very prominent UV pattern, nor does it reach very deep into UV, so this comparison here is limited to the range down to about 370nm, bare that in mind. The quartz fluorite lens is teh much sharper one and also has less fovus shift, but still the enlarger lens seems to be useful, at least as a beginners lens for reflected UV photography.

Here the transmission chart of that enlarger lens, as compared to my "standard" comparison lenses which reveals that it transmits UV quite similar to a Noflexar 35mm to about 335-340nm.
 

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, December 3, 2012

Eucharis grandiflora: UV induced fluorescence and reflected colorful UV photography II

This is again about: Eucharis × grandiflora, also called Amazon Lily this time using my "work horse" UV filter, the Baader-U filter and a Hamamatsu f3.5/50mm quartz fluorite lens. Light source was an UV enhanced Xenon flash and a Nichia UV torch for the UV induced stimulated visible fluorescence (UVIVF) shot.

[click on image to see a larger one]

visible light image:
 

"standard" UV image using Baader-U filter:
 

UV stimulated visible fluorescence using UV/IR blocking filter:
 

UV stimulated visible fluorescence using different UV/IR blocking filter:
 

Also here not much prominently visible UV pattern, except that the base of the flower, where usually nectar can be found, lights up, as well as its pollen does.

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

Eucharis grandiflora: UV induced fluorescence and reflected colorful UV photography

Today about a flower I haven't posted about: Eucharis × grandiflora, also called Amazon Lily. I was using my "work horse" UV filter, the Baader-U filter and my CERCO quartz fluorite lens. Light source was an UV enhanced Xenon flash and a Nichia UV torch for the UV induced stimulated visible fluorescence (UVIVF) shot.

[click on image to see a larger one]

visible light image:
 

"standard" UV image using Baader-U filter:
 

shortwave UV image using Jupiter-U filter:
 

UV stimulated visible fluorescence using UV/IR blocking filter:
 

Not much prominent UV pattern, except that the base of the flower, where usually nectar can be found, lights up, as well as its pollen does.

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