• Ultraviolet Photography
  •  

Eucalyptus melliodora [Yellow Box]

Fluorescence
6 replies to this topic

#1 DaveO

    Aussie Bunyip

  • Members(+)
  • 665 posts
  • Location: Maldon, Victoria, Australia

Posted 20 July 2015 - 04:55

Oldfield, D. 2015. Eucalyptus melliodora A. Cunn. ex Schauer (Myrtaceae) Yellow Box. Flowers photographed in visible and ultraviolet light.
http://www.ultraviol...ora-yellow-box/
Synonym
Eucalyptus patentiflora Miq.
Eucalyptus caerulescens Naudin
Eucalyptus forsythii Maiden
Eucalyptus argentea Cordier ex Blakely

Maldon, Victoria, Australia
7 June 2015
Australian Native Wildflower as Garden Specimen

Comment
Eucalyptus melliodora is extremely variable in form, bark and foliage colour and is common and widely distributed from south-eastern Queensland to western Victoria.

Visible Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Metz 15 MS-1 flash, 1/200 s @ f/16 ISO 200, Baader UV/IR Cut Filter.
Attached Image: Eucalyptus_melliodora_Vis.jpg
Image Reference: DO60451

Ultraviolet Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Nissin Di866 Mark II flash, 1/200s @ f/16 ISO 200, Baader UV-Pass Filter.
Attached Image: Eucalyptus_melliodora_UV.jpg
Image Reference: DO60459

Ultraviolet Induced Visible Fluorescence: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens with Baader UV/IR Cut Filter, Nichia NCSU033A UV-LED with Baader UV-Pass Filter, 30.0 s @ f/16 ISO 400.
Attached Image: Eucalyptus_melliodora_UVIVFL.jpg
Image Reference: DO60471

Another set showing the bud cap about to be lost.

Visible Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Metz 15 MS-1 flash, 1/200 s @ f/16 ISO 200, Baader UV/IR Cut Filter.
Attached Image: Eucalyptus_melliodora_bud_cap_Vis.jpg
Image Reference: DO60715

Ultraviolet Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Nissin Di866 Mark II flash, 1/200s @ f/16 ISO 200, Baader UV-Pass Filter.
Attached Image: Eucalyptus_melliodora_bud_cap_UV.jpg
Image Reference: DO60719

Ultraviolet Induced Visible Fluorescence: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens with Baader UV/IR Cut Filter, Nichia NCSU033A UV-LED with Baader UV-Pass Filter, 30.0 s @ f/16 ISO 400.
Attached Image: Eucalyptus_melliodora_bud_cap_UVIVFL.jpg
Image Reference: DO60721

The bud cap was then removed, it was fused to the cap of the smaller un-opened bud behind it.

Visible Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Metz 15 MS-1 flash, 1/200 s @ f/16 ISO 200, Baader UV/IR Cut Filter.
Attached Image: Eucalyptus_melliodora_bud_cap_int_Vis.jpg
Image Reference: DO60724

Ultraviolet Light: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Nissin Di866 Mark II flash, 1/200s @ f/16 ISO 200, Baader UV-Pass Filter.
Attached Image: Eucalyptus_melliodora_bud_cap_int_UV.jpg
Image Reference: DO60727

Ultraviolet Induced Visible Fluorescence: Nikon D750 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens with Baader UV/IR Cut Filter, Nichia NCSU033A UV-LED with Baader UV-Pass Filter, 30.0 s @ f/16 ISO 400.
Attached Image: Eucalyptus_melliodora_bud_cap_int_UVIVFL.jpg
Image Reference: DO60728

References:
Elliott, W.R. and Jones, D.L. Encyclopaedia of Australian Plants suitable for cultivation, Volume 4, 1986, Lothian, p. 145.
EUCLID Eucalypts of Australia, Centre for Plant Biodiversity Research, 2006, Third Edition, DVD.

Published 20 July 2015

#2 colinbm

    Member

  • Members(+)
  • 1,273 posts
  • Location: Australia

Posted 20 July 2015 - 12:05

You are doing very well Dave.
Col

#3 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 7,351 posts
  • Location: USA

Posted 20 July 2015 - 16:19

Dave, some time you must enter one of these fiber-optic effect photos in some scientific photo contest. They are very interesting.
Try the Detail slider on Photo Ninja to bring out a bit of structure.
Andrea G. Blum
Often found hanging out with flowers & bees.

#4 DaveO

    Aussie Bunyip

  • Members(+)
  • 665 posts
  • Location: Maldon, Victoria, Australia

Posted 21 July 2015 - 03:43

Here's a "warts and all" 100% extract for the UVIVFL shot with the bud cap detaching. I have not applied any noise reduction to the file from the camera but I did have the long exposure noise reduction setting turned on in the camera which makes it sit and think for a time equivalent to the exposure (30 s in this case) to remove any hot pixels and other stuff. I'm not sure that these stamens are fluorescing in their own right or just acting as fibre-optics as you suggest. They are effectively glowing tubes of water filled gel so the illumination is from within the "tube" and doesn't have a clearly defined edge as when you take a photograph by reflected light. It's really just like taking a photograph of a neon tube, the fluorescence is a bulk property not a surface effect.

Attached Image: Eucalyptus_melliodora_bud_cap_extract_UVIVFL.jpg

Here's the Visible version

Attached Image: Eucalyptus_melliodora_bud_cap_extract_Vis.jpg

and the UV one

Attached Image: Eucalyptus_melliodora_bud_cap_extract_UV.jpg

Edited by DaveO, 21 July 2015 - 05:15.


#5 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 7,351 posts
  • Location: USA

Posted 21 July 2015 - 17:47

I think the anthers on the end of the stamens would really be fluorescing, Dave. They are outputting the pollen and pollen tends to be fluorescent. My fiber optics remark was only intended to be a description of the appearance and not the actual functionality.
Andrea G. Blum
Often found hanging out with flowers & bees.

#6 DaveO

    Aussie Bunyip

  • Members(+)
  • 665 posts
  • Location: Maldon, Victoria, Australia

Posted 22 July 2015 - 04:32

I agree with you, I find the pollen is the most fluorescent part of any of my UVIVFL images. I need to increase the "illumination" slider in PN to get a good image usually and I try not to let the pollen burn out and the rest then falls into place as far as luminosity is concerned. So the stamens are often quite dim compared to the pollen. The UV image shows a lot of texture presumably from the cellular structure of the stamens, there also seems to be a blue tinge around the anthers in UV. In the UVIVFL you can clearly seen the two parts of the bud cap looking like a baked cake. According to Euclid there is no operculum scar on the buds meaning that the outer operculum (from the fused sepals) is not shed separately to form the scar, so the two opercula are shed together. The more you look the more you find.

#7 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 7,351 posts
  • Location: USA

Posted 22 July 2015 - 15:06

Yes the Illumination slider is very helpful for certain fotos. Also the Shadows slider. Well, all those PN sliders really - they all work to help tame our unusual fotos. :(

You have a good curious mind, Dave.
Andrea G. Blum
Often found hanging out with flowers & bees.