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UltravioletPhotography

Clematis cf. 'Lincoln Star' [Clematis]


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Crowther, J. (2019) Clematis L. cf. 'Lincoln Star' (Ranunculaceae) Clematis. Flowers photographed in ultraviolet and visible light.

https://www.ultravio...-star-clematis/

 

Egham, Surrey, UK

9 to 9:30AM, 23 May 2019

Cultivar in private garden

 

Comment:

I am not 100% certain that this is 'Lincoln Star', however the appearance is a close match to images found online.

 

Reference:

(1) Clematis on the Web (accessed June 2019) Lincoln Star

 

Equipment Visible [Canon EOS 5DSR + 28-105mm EF lens]

 

Equipment UV [Nikon D610-ACS UV conversion + Asahi 85mm f4.5 Ultra-Achromatic-Takumar with M42-Nikon lensless adapter]

 

Visible Light [lens set to 90mm, f/10 for 1/200s @ ISO 500 in daylight (partial shade), captured as JPEG in camera with auto whitebalance].

Image resized to 1000 pixels maximum size

post-148-0-93127300-1558556476.jpg

 

Ultraviolet Light [f/22 for 20s @ ISO 800 in daylight (overcast and in the shade), whitebalanced in Darktable using PTFE disk]

Images resized to 1000 pixels maximum size

 

Complete flower

post-148-0-66128100-1558556466.jpg

 

Center of flower (cropped from original image before resizing)

post-148-0-79821100-1558556483.jpg

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G'day,

 

I see this UV-blue quite a bit in some of my UV images of Australian native flowers so it is quite widespread. You can probably guess where this is going from a retired chemist suffering lab-withdrawal symptoms. It would be nice to see the UV-Vis reflectance spectra of the petals and also of the black stamens etc in the centre.

Here's a very interesting paper which shows such spectra

 

how to colour a flower

http://rspb.royalsocietypublishing.org/content/283/1830/20160429

 

Dave

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  • 1 month later...

Thanks for the contribution, Jonathan.

 

Dave, I'm enjoying this paper. Good info. Thanks for the link.

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