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Glowing flowers (UV induced visible fluorescence)

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tefoonez View Drop Down
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Post Options Post Options   Quote tefoonez Quote  Post ReplyReply Direct Link To This Post Posted: 01 September 2012 at 10:48
What amazing imagery - not seen anything like it before really - best not get too interested as enough to learn with 'normal' photography

Daniel
A77II, Sony 70-400G II, Tamron 28-75, Sigma 18-35, Zeiss 135 1.8
 



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tarabelle View Drop Down
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Post Options Post Options   Quote tarabelle Quote  Post ReplyReply Direct Link To This Post Posted: 01 September 2012 at 14:46
Awesome shots!

I love the dandelion wishie and #9 the cornflower best

Thanks for sharing these
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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 02 September 2012 at 15:13
Thanks, Daniel and Tarabelle!
I appreciate Your comments. More shots will come next weekend.

Alex
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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 29 September 2012 at 10:49
Two versions of "Flowering Rush" flowers ...

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17) Flowering rush #1



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18) Flowering rush #2



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Thanks for looking, Alex
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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 30 September 2012 at 09:38

19) Edging Lobelia



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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 21 October 2012 at 14:14
Just processed my few remaining shots from this summer. Here are the first three.

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20) Russian Globe Thistle (flowering)



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21) Great Globe Thistle #1 (young inflorescence with unopened flowers)



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22) Great Globe Thistla #2 (same as previous one)



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Thanks for looking, Alex
 



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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2012 at 12:54
Few more pics to revive this thread

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23) Common mallow #1



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24) Common mallow #2



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25) Common mallow #3



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Thank You all for looking, Alex
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GJK View Drop Down
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Post Options Post Options   Quote GJK Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2012 at 01:53
Wow.....very impressive work....will read blog, a new dimension to macro flowers photos,on the to/do list
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Stormvogel View Drop Down
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Post Options Post Options   Quote Stormvogel Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2012 at 02:23
The most beautiful flowers I ever seen in a photographic way.

TFS Willem.

All ways in a good mood here.
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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2012 at 07:14
Thanks Willem and GJK!

(PS: the blog is under major revision to become part of my main gallery web site so it is not accessible, sorry).
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kerrath View Drop Down
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Post Options Post Options   Quote kerrath Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2012 at 10:50
These are haunting and amazing images. I skimmed through the thread (mostly interested in the photos) and I didn't see anything quite detailing how you did it. UV LED light and a UV pass filter?

Would you be willing to share some steps/instructions on how to succeed at this? I would love to try my hand at it.

I had a thought concerning UV light sources: to the best of my knowledge flashes have a good amount of UV in their spectrum. Is it enough to create this fluorescence if you're using a UV-pass filter? Is there a filter that could be placed over the flash rather than placing one over the lens?
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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 04 December 2012 at 09:10
Originally posted by kerrath kerrath wrote:

These are haunting and amazing images. I skimmed through the thread (mostly interested in the photos) and I didn't see anything quite detailing how you did it. UV LED light and a UV pass filter?

Would you be willing to share some steps/instructions on how to succeed at this? I would love to try my hand at it.

I had a thought concerning UV light sources: to the best of my knowledge flashes have a good amount of UV in their spectrum. Is it enough to create this fluorescence if you're using a UV-pass filter? Is there a filter that could be placed over the flash rather than placing one over the lens?


That is true, I am just showing the pictures this time. May be in the future I can write how I did it, but right now I have little time.

The flashes are indeed powerful UV sources, but most of the modern ones have either UV-blocking coating on flash-tubes, or UV-blocking internal filters. There are uncoated bulbs sold of studio strobes. In any case, you would have to put UV-pass filter over the flash or strobe to block visible light.

Also, there is no filter in front of the lens. Complex modern multicoated lens and internal cut filter of the camera block UV well enough to prevent any contamination of resulting picture.
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mhtrang View Drop Down
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Post Options Post Options   Quote mhtrang Quote  Post ReplyReply Direct Link To This Post Posted: 04 December 2012 at 16:38
Alex H, I loved seeing these pictures during April Foolishness and am glad you decided to keep doing them. Keep it up!
Michael
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skm.sa100 View Drop Down
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Post Options Post Options   Quote skm.sa100 Quote  Post ReplyReply Direct Link To This Post Posted: 04 December 2012 at 17:05
I suppose everyone else has already said this in some form or another but I'll say it again: very nicely done!!
Some of the pictures just make me say "Wow!"
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