Magnesium Fluoride Crystals
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Magnesium Fluoride Crystals
Magnesium Fluoride Crystals
Top image:
Nikon Type S with Transmitted DIC attachment
DIC in darkfield setting - Leitz 25x Apo
Olympus 2.5X projection eyepiece
Canon 10D
Middle image:
Leitz Ortholux
Polarized brightfield - Leitz 25X Apo objective .
10X Periplan GF projection eyepiece plus 1/3X relay lens
Canon 10D
Lower image:
Canon Pro90 IS with 24x E3500 close up lens
Photoshop
After opening up an old vacuum tank coating machine at work a fine dust of these crystals were found on a piece of metal inside. They made for a fine microscopic observing session in polarized and DIC light.
Walt
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I'm with Bill about that second picture -- composition, sharpness, color, it's got 'em all. Very nice!
The third picture helps a lot to show context and setting -- thanks for posting that. As usual, my eyes & brain keep obsessing over the color fringes caused by the close-up lens, so I'll put in my periodic pitch for PTLens (http://epaperpress.com/ptlens/). It's a free Windows utility that runs either stand-alone or as a Photoshop plugin. Corrects for a multitude of lens distortions including CA (chromatic aberration). Similar software is available for Mac. Let me know if you'd like to see or know more.
--Rik
The third picture helps a lot to show context and setting -- thanks for posting that. As usual, my eyes & brain keep obsessing over the color fringes caused by the close-up lens, so I'll put in my periodic pitch for PTLens (http://epaperpress.com/ptlens/). It's a free Windows utility that runs either stand-alone or as a Photoshop plugin. Corrects for a multitude of lens distortions including CA (chromatic aberration). Similar software is available for Mac. Let me know if you'd like to see or know more.
--Rik
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- Posts: 693
- Joined: Mon Aug 14, 2006 6:42 pm
- Location: South Beloit, Ill
Thanks Bill and Rick for your kind words. I am especially pleased that you found the middle image to be sharp. I tested many of the old objectives in my arsenal and this one turned out to be one of the best. Also to avoid any possible confusion. The crystal in the top two images was extracted from the mass you see and mounted in mounting medium in a standard 1x3 slide under a cover slip.
I will also look into the software you suggested Rik, thanks again.
One other thing, they may be fluorite not fluoride.
Walt
I will also look into the software you suggested Rik, thanks again.
One other thing, they may be fluorite not fluoride.
Walt