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diatom cork screw

 
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Wim van Egmond



Joined: 15 Aug 2006
Posts: 825
Location: Berkel en Rodenrijs, the Netherlands

PostPosted: Thu Oct 05, 2006 8:14 am    Post subject: diatom cork screw Reply with quote

This monday I went to belgium and when I drove back I took the opportunity to go past the Zeeland Deltaworks http://www.deltawerken.com/Deltaworks/23.html to catch some plankton from the sea. It was stormy weather and raining hard. I was completely wet but I caught some nice diatoms. I had only 1 day to photograph them because my camera had to go to the repairs as soon as possible.

This is a Guinardia species. They are diatoms that form helical colonies. It is a stack becaue they are big and deep. Microscopic subjects appear quite flat when stacked so I made the more distant parts a bit darker.

Wim

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Gyrosigma



Joined: 04 Aug 2006
Posts: 134
Location: France Normandie

PostPosted: Thu Oct 05, 2006 8:48 am    Post subject: Reply with quote

Quote:
Microscopic subjects appear quite flat when stacked so I made the more distant parts a bit darker.


Fantastic idea !!! I never think to that, but of course you are right, it gives realy deep impress

welldone Wim

best regards

Dominique
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Wim van Egmond



Joined: 15 Aug 2006
Posts: 825
Location: Berkel en Rodenrijs, the Netherlands

PostPosted: Thu Oct 05, 2006 9:01 am    Post subject: Reply with quote

Smile I always regard photography as 'painting with light' so why not paint a little darkness as well! Smile

Wim
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Ken Ramos



Joined: 27 Jul 2006
Posts: 7052
Location: lat=35.4005&lon=-81.9841

PostPosted: Thu Oct 05, 2006 2:54 pm    Post subject: Reply with quote

You know I hate to be a skeptic but that sure looks like a lit flashlight bulb to me. Never seen one of these before, that I can think of. Interesting specimen Wim. Very Happy
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Wim van Egmond



Joined: 15 Aug 2006
Posts: 825
Location: Berkel en Rodenrijs, the Netherlands

PostPosted: Fri Oct 06, 2006 1:33 am    Post subject: Reply with quote

Now I understand, Ken! I also wondered how this diatom appeared in the image while I hade no sample under the microscope. I should have adjusted the illumination a bit better.

However, isn't this the perfect Kohler illumination with the filament projected in the image? Oh no, that was critical (Nelson) illumination.

I am confused! Idea

Wim
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beetleman



Joined: 04 Aug 2006
Posts: 3578
Location: Southern New Hampshire USA

PostPosted: Fri Oct 06, 2006 5:45 am    Post subject: Reply with quote

Beautiful Creature Wim...wonderful shapes in nature
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Take Nothing but Pictures--Leave Nothing but Footprints.
Doug Breda
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Adrian



Joined: 24 Aug 2006
Posts: 191
Location: Australia

PostPosted: Fri Oct 06, 2006 1:36 pm    Post subject: Reply with quote

Laughing, i was thinking it looked like that too.
but you can tell it apart cause it looks cut into cells, very interesting shape it has

Wim van Egmond wrote:
Now I understand, Ken! I also wondered how this diatom appeared in the image while I hade no sample under the microscope. I should have adjusted the illumination a bit better.

However, isn't this the perfect Kohler illumination with the filament projected in the image? Oh no, that was critical (Nelson) illumination.

I am confused! Idea

Wim
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