29 replies to this topic

[UlfW]

Wilhelmson, U. (2020) Myosotis L. sp. (Boraginaceae) Forget-me-not. Stacked photo in reflected ultraviolet light. https://www.ultravio...-a-tiny-flower/

Reference:
1. Wikipedia (08 Dec 2020) Myosotis. Wikimedia Foundation, San Francisco, CA.

Comment:
For my my first test stack trying my Milar 6.5cm/4.5 I used a very small ForgetMeNot that has been kept reasonably fresh in my fridge for several weeks.
The flowers are very tiny, only a bit more than 1mm in diameter.

The stack is made from 24 images with a UV-pass filter stack: S8612, 2mm + U-360, 2mm.

The magnification is 2.4x on the sensor.



A closer crop with no additional sharpening.

[JMC]

Blimey. Congratulations, that looks pretty good Ulf.

[nfoto]

More than good, excellent.

[UlfW]

Thank you.
With some sharpening it gets even better, but the non focussed areas becomes noisy and some stacking artefacts more visual.
The sharpening has to be done selectively. I have to learn more about how to do that well.

Edited by UlfW, 14 July 2020 - 15:04.

[colinbm]

A tiny 1mm flower......this is fantastic Ulf.

[UlfW]

A sharpened part at 100% that looks mostly good:

I now realise that the image above wasn't at 100%. This is.

Edited by UlfW, 14 July 2020 - 13:14.

[colinbm]

Is this snip about 2mm across ?

[UlfW]

I think the flower is a Myosotis Stricta.
I picked a tiny bouquet of them in mid May.
This last individual survived at least partly for many weeks in my fridge.

[UlfW]

colinbm, on 14 July 2020 - 13:15, said:

Is this snip about 2mm across ?

The full image at the top of the thread covers 10 x 15 mm => ca 3.3mm if I do the calculation right.
My guesstimate was slightly off in the first post.

Edited by UlfW, 14 July 2020 - 13:27.

[Stefano]

How is such a tiny flower pollinated?

[UlfW]

That is the big question, especially as it looks like the active parts are hidden further down in flower.
Here is a VIS stack from the same bouquet when it was fresh back in May, when I was relearning the craft of stacking:

Edited by UlfW, 14 July 2020 - 14:02.

[Bernard Foot]

Excellent work, Ulf - and no dust tracks!

[Cadmium]

Wow! Great shots, I really like the visual one too!

[dabateman]

So we need to take over the fridge with subjects as well as the house with photo gear. I will have to remember that.

These are amazing. Excellent.

[nfoto]

As Myosotis is not 'fauna' by any stretch of imagination, I took the liberty of moving this topic into the Botanical section ....

[UlfW]

Thanks.
A mental laps of me choosing fauna.
A Myosotis plant is not at all looking like a triffid.

Edited by UlfW, 15 July 2020 - 11:37.

[nfoto]

Aha, another reader of that sci-fi classic The Day of the Triffids -- excellent. John Wyndham had the ability to make believable post-apocalyptic narratives, for sure. In my view, better than 'The Kraken Wakes which followed it.

[Andrea B.]

Editor's Note: For a topic to be in this section, it must have a searchable title else it breaks my indexing algorithm.

Old Title: Tiny ForgetMeNot
New Title: Myosotis sp. [Forget-Me-Not]: Stacking a Tiny Flower

****

Excellent stack! The details are fascinating.

[Andy Perrin]

It's fantastic work. I do have a question, though: what is that almost "foggy" appearance in the UV photos? I have seen this in some of mine, but I don't know the cause of it, and it's not with every lens.

[Stefano]

Andy Perrin, on 15 July 2020 - 20:08, said:

It's fantastic work. I do have a question, though: what is that almost "foggy" appearance in the UV photos? I have seen this in some of mine, but I don't know the cause of it, and it's not with every lens.

I don't see the "fog" in this photos, but my idea is that the glass the lens is made of fluoresces. Some lenses may fluoresce less than others.