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Petroleum

Fluorescence
7 replies to this topic

#1 Harald

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Posted 17 February 2020 - 21:19

Hi,
My first post.
This is Quartz with Petroleum inclusions from Pakistan. Photographed with EOS 5D II and MP-E65. Convoy S2 365nm from behind.
The crystal is about 10mm tall. Stacking of 200+ images

Attached Image: PM-2020-02-06-15.00.17 ZS PMax.jpg

#2 Andy Broomé

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Posted 17 February 2020 - 21:24

Excellent clarity! Thanks for sharing.

#3 colinbm

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Posted 17 February 2020 - 22:33

That is weird......

#4 OlDoinyo

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Posted 17 February 2020 - 23:20

The geology behind that must be interesting. How on earth does that form?

#5 dabateman

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Posted 17 February 2020 - 23:26

Excellent angle.
I look forward to seeing more minerals.
I keep meaning to take a convoy on hikes, but for get. We have some interesting quartz around us. But not nicely polished like this.

#6 Adrian

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Posted 18 February 2020 - 16:02

Beautiful! What was the size of the specimen please, requiring such a large number of slices for the stack?
Adrian
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#7 nfoto

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Posted 18 February 2020 - 16:24

The initial post says 10mm. Meaning we are around 3X at least, thus a high number of images are required for a good stack of a "deep" 3-D object.

#8 Harald

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Posted 18 February 2020 - 17:10

Hi,
First, I´m not sure how it's formed in nature. There must be some bobles in the crystallisation and somehow the petroleum seeps in.

As for stacking, I use a large aperture to avoid distortion, that's why I need so many frames. In addition to get a smooth and sharp image I also use some overlapping.
StackShot is used to automate the recording of each image