Zodiac Moth Scales

Images taken in a controlled environment or with a posed subject. All subject types.

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Macro_Cosmos
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Zodiac Moth Scales

Post by Macro_Cosmos »

Haven't done one of these in a long while.
100x obj. mag.

Image
Bigger one here: https://flic.kr/p/2jXSjwy

Thanks!

kutilka
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Re: Zodiac Moth Scales

Post by kutilka »

Perfect!

sushidelic
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Re: Zodiac Moth Scales

Post by sushidelic »

Hi Dan.
Looking great!
Best regards,
Michael

Guppy
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Re: Zodiac Moth Scales

Post by Guppy »

Hi Dan

I really like your pictures.
Which 100x lens do you use?

Your pictures look a bit flat.
I assume that your lighting is all around and even, without shadows.
With lateral light you get soft shadows, the object gains depth and the visible resolution is higher.

Kurt

Macro_Cosmos
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Re: Zodiac Moth Scales

Post by Macro_Cosmos »

Guppy wrote:
Mon Nov 02, 2020 8:16 am
Hi Dan

I really like your pictures.
Which 100x lens do you use?

Your pictures look a bit flat.
I assume that your lighting is all around and even, without shadows.
With lateral light you get soft shadows, the object gains depth and the visible resolution is higher.

Kurt
100x, epi-illumination, so it's very flat and even.
There's no other way to light it because of the short working distance.

rjlittlefield
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Re: Zodiac Moth Scales

Post by rjlittlefield »

Macro_Cosmos wrote:
Mon Nov 02, 2020 10:14 am
100x, epi-illumination, so it's very flat and even.
There's no other way to light it because of the short working distance.
In principle, epi-illumination can be structured so that light comes out of just part of the front of the lens. If that part is sufficiently small and off-center, then you should get the corresponding modeling, complete with shadows.

But I have never tried to implement this, so I do not know what practical difficulties will turn up. I expect it will be quite difficult or impossible with many systems.

--Rik

Pau
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Re: Zodiac Moth Scales

Post by Pau »

rjlittlefield wrote:
Mon Nov 02, 2020 11:08 am
Macro_Cosmos wrote:
Mon Nov 02, 2020 10:14 am
100x, epi-illumination, so it's very flat and even.
There's no other way to light it because of the short working distance.
In principle, epi-illumination can be structured so that light comes out of just part of the front of the lens. If that part is sufficiently small and off-center, then you should get the corresponding modeling, complete with shadows.

But I have never tried to implement this, so I do not know what practical difficulties will turn up. I expect it will be quite difficult or impossible with many systems.

--Rik
In principle oblique illumination doesn't need to be difficult. If your epiilluminator allows it, you can put a mask close of the aperture diaphragm like with transmitted illumination. You could also decenter the lamp or the aperture diaphragm or both. Again like with transmitted, NA will be reduced to some extent if the objective rear aperture is not fully illuminated.
Like Rik, I also lack enough direct experience although I've read about the subject.
Pau

Guppy
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Re: Zodiac Moth Scales

Post by Guppy »

Hi Dan

"100x, epi-illumination" unfortunately says little about the lens.
Nevertheless, it should be possible to darken a little bit on one side of the light path.

Good luck

Kurt

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