• Ultraviolet Photography
  •  

Lots of dandelions

White Balance
24 replies to this topic

#1 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 26 March 2020 - 13:14

I have a lot of dandelions growing in my garden. Today they are not fully open because of the overcast weather, but the pattern still shows up. This is just a quick photo I took, this topic is intended to be informal.

Do I need to post the settings?

Attached Images

  • Attached Image: P1010709.JPG


#2 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 26 March 2020 - 13:16

I can really see how bees can spot them, they stand out quite well.

#3 nfoto

    Former Fierce Bear of the North

  • Owner-Administrator
  • 3,184 posts
  • Location: Sørumsand, Norway

Posted 26 March 2020 - 13:51

Ah, my darling dandelions. Nicest flower of them all :smile: :bee:

#4 WiSi-Testpilot

    Member

  • Members(+)
  • 105 posts
  • Location: Germany

Posted 26 March 2020 - 21:54

Löwenzahn / Pusteblume is also my favorite flower.
I took the picture yesterday.

Attached Images

  • Attached Image: Loewenzahn_25_3_2020.JPG


#5 Cadmium

    Member

  • Members+G
  • 4,167 posts

Posted 27 March 2020 - 04:55

UV and Visual Dandelion shots.
Attached Image: UV_Vis_FS_1080.jpg

UV and Visual Dandelion composite overlay.
Attached Image: Dandelion_UV_VIS_overlay_1280.jpg

#6 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 8,780 posts
  • Location: UVP Western Division, Santa Fe, New Mexico

Posted 27 March 2020 - 18:07

I enjoy seeing an array of dandelions like that!
Andrea G. Blum
Often found hanging out with flowers & bees.

#7 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 8,780 posts
  • Location: UVP Western Division, Santa Fe, New Mexico

Posted 27 March 2020 - 18:33

Stefano, here is something interesting to look for. When the dandelion flower fades and closes up, an IR photo will show the closed involucre ("cup" in which the dandelion grows) as IR-dark.
https://www.ultravio...&attach_id=5163

I never really appreciated the intricacy and beauty of dandelions until I photographed them in UV and IR. :cool:
Andrea G. Blum
Often found hanging out with flowers & bees.

#8 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 27 March 2020 - 20:03

View PostAndrea B., on 27 March 2020 - 18:33, said:

Stefano, here is something interesting to look for. When the dandelion flower fades and closes up, an IR photo will show the closed involucre ("cup" in which the dandelion grows) as IR-dark.
https://www.ultravio...&attach_id=5163

I never really appreciated the intricacy and beauty of dandelions until I photographed them in UV and IR. :cool:
I remember noticing it too. It is one of the very few examples of dark plants in IR (not considering bark).

#9 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 27 March 2020 - 20:10

Today there was more sun and the flowers (or better flower heads, right?) fully opened.

Attached Image: P1010770.JPG

Attached Image: P1010781.JPG

Attached Image: P1010789.JPG

Bees doing their job:

Attached Image: P1010796.JPG

Attached Image: P1010775.JPG

#10 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 8,780 posts
  • Location: UVP Western Division, Santa Fe, New Mexico

Posted 28 March 2020 - 19:24

And it looks like some bees or flies are also enjoying the Dandelions. :grin:
Andrea G. Blum
Often found hanging out with flowers & bees.

#11 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 28 March 2020 - 19:32

Yes, there are bees in the last two photos.

#12 nfoto

    Former Fierce Bear of the North

  • Owner-Administrator
  • 3,184 posts
  • Location: Sørumsand, Norway

Posted 28 March 2020 - 20:16

Dandelions always attract a lot of pollinators. However that's smoke and mirrors as the plants don't *need* the pollinators at all ! All the microspecies of Taraxacum are apomictic (or to use an even more fancy word from the language of botany, agamogenetic).

If evolution was driven by easily understood forces we wouldn't expect such a strategy as making the flower parts surely "cost" the plants a lot of the photosynthetic energy they harvest. A number of the smaller microspecies of Taraxacum have taken this lesson to heart and produce little or no pollen at all. They still need having to flowers in order to set fruit and thus ensure their dispersal, though.

#13 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 08 April 2020 - 18:51

Taken two days ago. We are having a lot of sunny days in a row here (almost a week).

F-stop: f/2.8, ISO 400, 1/8 s exposure.
Attached Image: P1000862.JPG

I was lucky, but this was the best one out of 14 images taken in a row, keeping the button pressed.

Also notice how my camera probably "clipped off" blacks, those nectar guides are really dark.

Edited by Stefano, 08 April 2020 - 18:52.


#14 Andy Perrin

    Member

  • Members+G
  • 4,093 posts
  • Location: United States

Posted 08 April 2020 - 19:12

That is a good one!

#15 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 08 April 2020 - 19:30

Thank you Andy!

Here is a crop (I still needed to resize it, but you have more resolution)

Attached Image: P1000862 - Copia.JPG

#16 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 19 March 2021 - 22:07

And now, the updated version:

Camera: Full spectrum Canon EOS M
Lens: Soligor 35 mm f/3.5
Filter: ZWB2 (2 mm) + Chinese BG39 (2 mm)

f/3.5, ISO 3200, 1/30 s exposure.
Attached Image: IMG_1408.JPG

f/8, ISO 3200, 1/2 s exposure.
Attached Image: IMG_1428.JPG

f/8, ISO 3200, 1/2 s exposure.
Attached Image: IMG_1436.JPG

The apertures can be incorrect, the values I put are those I think I used. I didn't use a tripod, but the last two images were taken with the lens resting on a wall (first) and a rock (second). Beware, not the bare lens, but the filter, where there is the black tape. I would never put the lens on those surfaces.

#17 dabateman

    Da Bateman

  • Members+G
  • 2,771 posts
  • Location: Maryland

Posted 19 March 2021 - 22:41

Wow you have dandelions already. We still don't have flowers yet.

#18 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 19 March 2021 - 22:43

View Postdabateman, on 19 March 2021 - 22:41, said:

Wow you have dandelions already. We still don't have flowers yet.
This morning we even had a bit of snow, that melted after an hour or so.

#19 Andrea B.

    Desert Dancer

  • Owner-Administrator
  • 8,780 posts
  • Location: UVP Western Division, Santa Fe, New Mexico

Posted 20 March 2021 - 19:11

Also notice how my camera probably "clipped off" blacks, those nectar guides are really dark.

I'm not sure that your camera clipped blacks? It looks more like some minor contamination from vis or ir???
Andrea G. Blum
Often found hanging out with flowers & bees.

#20 Stefano

    Member

  • Members(+)
  • 1,800 posts
  • Location: Italy

Posted 20 March 2021 - 19:31

How can darkness indicate a leak, in this case? I would expect the nectar guides to be lighter instead.

To me it seems like my camera clipped the blacks and those pixels became 0, 0, 0.