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Gradient Universal Filter - 'DIC', DF, OL effects
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Litonotus



Joined: 20 Jun 2011
Posts: 1394
Location: Poland

PostPosted: Tue Nov 15, 2011 11:04 am    Post subject: Gradient Universal Filter - 'DIC', DF, OL effects Reply with quote

the quality is 'so so', but this is all I'm able to do now. All are taken using my Gradient Universal Filter that allows me to adjust both contrast and background brightness.


water flea (4 image 'hand made' stack)


water fleas (put together in PS)


rotifer - 4 images put together in PS


Last edited by Litonotus on Fri Nov 25, 2011 8:20 am; edited 2 times in total
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Jan l'Amie



Joined: 26 Jul 2011
Posts: 268
Location: The Netherlands

PostPosted: Tue Nov 15, 2011 12:00 pm    Post subject: Reply with quote

Great pictures. Very nice detail.
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Byomic BYO500T microscope /CIOC XDS-1 invert.
Byomic ST-340 stereomicroscope
Olympus BHM Metallurgical Microscope
Canon EOS 7D Mark II / Canon MP-E65
Cognisys StackShot
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RogelioMoreno



Joined: 20 Nov 2009
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PostPosted: Tue Nov 15, 2011 3:07 pm    Post subject: Reply with quote

Very nice!

Rogelio
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Pau
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Joined: 20 Jan 2010
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Location: Valencia, Spain

PostPosted: Tue Nov 15, 2011 3:43 pm    Post subject: Reply with quote

Very good!
Please show us your magical DIC like filter and how to use it.
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Chris_M



Joined: 03 Apr 2011
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PostPosted: Tue Nov 15, 2011 3:53 pm    Post subject: Reply with quote

Very nice set!
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Litonotus



Joined: 20 Jun 2011
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PostPosted: Wed Nov 16, 2011 1:39 am    Post subject: Reply with quote

thank you (:

it is not magical, it only required months of experiments.

it looks like this:

it is made of a grey gradient printed on a trasnparent foil, all fixed with black masking sticky foil.

and how it is seen through the eyepiece:

It is placed under the condenser between its bottom and the filter tray, and this placement allows the XY movement.

I have no possibility to take better images, but this filter provides a big number of effects: obligue light, 'DIC like' effect and even darkfield which I can't show here because my 'technique' of taking images makes it impossible for the camera. It works great with 5x, 10x and 20x objectives, on higher magnifications it gives only obligue light.
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Wim van Egmond



Joined: 15 Aug 2006
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PostPosted: Wed Nov 16, 2011 1:42 am    Post subject: Reply with quote

Very nice results. I wonder if this technique works better than the one described in Jan's posting.

Wim
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Pau
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Joined: 20 Jan 2010
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PostPosted: Wed Nov 16, 2011 1:56 am    Post subject: Reply with quote

Many thanks, Linotus

It's a very interesting device.
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Jan l'Amie



Joined: 26 Jul 2011
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PostPosted: Wed Nov 16, 2011 2:09 am    Post subject: Reply with quote

Thanks, a very nice idea for a new filter experiment to me.

Greetings
Jan
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Byomic BYO500T microscope /CIOC XDS-1 invert.
Byomic ST-340 stereomicroscope
Olympus BHM Metallurgical Microscope
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Cognisys StackShot
www.ngvm.nl
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Litonotus



Joined: 20 Jun 2011
Posts: 1394
Location: Poland

PostPosted: Wed Nov 16, 2011 10:24 am    Post subject: Reply with quote

thank you all (:

Wim van Egmond wrote:
Very nice results. I wonder if this technique works better than the one described in Jan's posting.


I think it works better because it is universal - there is only one filter that gives many effects on at least 3 different magnifications (: I'm sure it is possible to modify this idea to be much better.

---------------------------------------------

I added a filter comparison below. I like better the grey one, but the blue gives visually more attractive images.

10x plan PZO objective


20x PZO achromat objective
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Jacek



Joined: 02 Oct 2011
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PostPosted: Wed Nov 16, 2011 2:22 pm    Post subject: Reply with quote

My friend, very interesting and innovative solution, very nice photos
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Wim van Egmond



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

PostPosted: Thu Nov 17, 2011 1:37 am    Post subject: Reply with quote

The result is very nice. The nice thing about your design is that it is simple to make. Only that gradient is a bit of work.

I wonder what would happen if you would use a polarised filter instead of the gradient. The polar filter where the gradient area is, leaving an open space above it for the direct light. With another polar filter you can make the filter darker (by rotating it) I think it will act like the gradient. I 'll try to find time to try it. Thanks for posting this Litonotus. It is a long time since I used these techniques and I am curious how your method works.

Wim
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Litonotus



Joined: 20 Jun 2011
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Location: Poland

PostPosted: Thu Nov 17, 2011 4:23 am    Post subject: Reply with quote

thank you Jacek (:

Wim van Egmond wrote:
Only that gradient is a bit of work.

just print it on a transparent foil, that's all. every basic graphic program makes gradients. I use illustrator for that.

write about your trials.
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Mitch640



Joined: 15 Aug 2010
Posts: 2137

PostPosted: Thu Nov 17, 2011 4:33 am    Post subject: Reply with quote

And just where on your microscope does the filter go?
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Litonotus



Joined: 20 Jun 2011
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Location: Poland

PostPosted: Thu Nov 17, 2011 4:43 am    Post subject: Reply with quote

Mitch640 wrote:
And just where on your microscope does the filter go?


Litonotus wrote:
It is placed under the condenser between its bottom and the filter tray
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