Puente Formation Diatoms Oblique Stacks

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rnabholz
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Puente Formation Diatoms Oblique Stacks

#1 Post by rnabholz » Sun Sep 02, 2018 8:52 pm

After encouragement from 75, I set out this afternoon to see what I could come up by way of stacking oblique images. I was concerned about artifacts from the halos that you get when changing focus point in oblique. I reduced the degree to which pushed the oblique effect and it think it helped some.

These are fossil diatoms from the Puente formation in California. It can be tough to find undamaged diatoms from fossil material, there is one wreck and some chips out of some of these.

AO Series 4 Apostar, 90x Apo, Oblique mask, Canon 70D, Zerene Stacker. Cleaned up the background on all.
109µm  10 image stack
109µm 10 image stack
Puente 9562-71 Final.jpg (153.71 KiB) Viewed 1828 times
73µm 7 image stack
73µm 7 image stack
Puente 9572-78 PMax Final.jpg (177.79 KiB) Viewed 1828 times
30µm 8 image stack
30µm 8 image stack
Puente 9579-86 PMax Final.jpg (92.59 KiB) Viewed 1828 times
67µm  12 image stack
67µm 12 image stack
Puente 9587-98 Final ZS PMax.jpg (81.24 KiB) Viewed 1828 times
Last edited by rnabholz on Mon Sep 03, 2018 3:34 am, edited 1 time in total.

PeteM
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Re: Puente Formation Diatoms Oblique Stacks

#2 Post by PeteM » Sun Sep 02, 2018 9:05 pm

The second image, in particular, is other worldly. Very cool -- thanks for posting them.

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Aenima
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Re: Puente Formation Diatoms Oblique Stacks

#3 Post by Aenima » Sun Sep 02, 2018 10:15 pm

wow, really nice detail - second and last two images are especially good.

lol edit; "last three images" would have been a better way to put it :P

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zzffnn
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Re: Puente Formation Diatoms Oblique Stacks

#4 Post by zzffnn » Sun Sep 02, 2018 10:47 pm

Beautifully done, Rod! #1 probably does not need much oblique to stack.
Last edited by zzffnn on Mon Sep 03, 2018 2:02 am, edited 1 time in total.

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vasselle
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Re: Puente Formation Diatoms Oblique Stacks

#5 Post by vasselle » Mon Sep 03, 2018 1:32 am

Bonjour.
De sublimes images.
Très beaux travail.
Cordialement seb
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rnabholz
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Re: Puente Formation Diatoms Oblique Stacks

#6 Post by rnabholz » Mon Sep 03, 2018 1:52 am

PeteM wrote:The second image, in particular, is other worldly. Very cool -- thanks for posting them.
Thanks Pete.

I am not sure I have seen that diatom before, and the oddly shaped bit to the right of it adds some interest too.

Glad you liked it.

Rod

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Re: Puente Formation Diatoms Oblique Stacks

#7 Post by rnabholz » Mon Sep 03, 2018 1:53 am

Aenima wrote:wow, really nice detail - second and last two images are especially good.

lol edit; "last three images" would have been a better way to put it :P
Thanks Aenima, I knew what you meant ;^)

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rnabholz
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Re: Puente Formation Diatoms Oblique Stacks

#8 Post by rnabholz » Mon Sep 03, 2018 1:57 am

zzffnn wrote:Beautifully done, Rod! #1 probably does not need much oblique to stack.
Thanks zz

Yes the first form, Actinoptychus, has a good bit of relief built in, hard to miss with that one.

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rnabholz
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Re: Puente Formation Diatoms Oblique Stacks

#9 Post by rnabholz » Mon Sep 03, 2018 1:58 am

vasselle wrote:Bonjour.
De sublimes images.
Très beaux travail.
Cordialement seb
Merci Beaucoup Seb
Last edited by rnabholz on Mon Sep 03, 2018 1:05 pm, edited 1 time in total.

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Re: Puente Formation Diatoms Oblique Stacks

#10 Post by rnabholz » Mon Sep 03, 2018 2:03 am

I keep looking at the centric in image three.

The "spots" keep alternating between raised and sunken as I view them. If I look and see them as raised, I can look away and back again and they become sunken.

Anybody else, or should I see a doctor? ;^)

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75RR
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Re: Puente Formation Diatoms Oblique Stacks

#11 Post by 75RR » Mon Sep 03, 2018 5:38 am

Looking good. Mini oblique + mini µm steps is the way to go.
I keep looking at the centric in image three.

The "spots" keep alternating between raised and sunken as I view them. If I look and see them as raised, I can look away and back again and they become sunken.

Anybody else, or should I see a doctor?
If you do so do I. ;) Not your eyes but your brain - it is undecided!

Make a copy of the image and rotate it 180 degrees. Place it beside its duplicate, like so ... it helps your brain decide :)
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Re: Puente Formation Diatoms Oblique Stacks

#12 Post by PeteM » Mon Sep 03, 2018 5:42 am

rnabholz wrote:I keep looking at the centric in image three.

The "spots" keep alternating between raised and sunken as I view them. If I look and see them as raised, I can look away and back again and they become sunken.

Anybody else, or should I see a doctor? ;^)
Reversals like that are a classic optical illusion. Keep it up and you could become a doctor (your PhD, in visual perception).

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rnabholz
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Re: Puente Formation Diatoms Oblique Stacks

#13 Post by rnabholz » Mon Sep 03, 2018 12:59 pm

75RR wrote:Looking good. Mini oblique + mini µm steps is the way to go.
I keep looking at the centric in image three.

The "spots" keep alternating between raised and sunken as I view them. If I look and see them as raised, I can look away and back again and they become sunken.

Anybody else, or should I see a doctor?
If you do so do I. ;) Not your eyes but your brain - it is undecided!

Make a copy of the image and rotate it 180 degrees. Place it beside its duplicate, like so ... it helps your brain decide :)
My brain thanks you for the clarity you brought to the situation with your illustration..... ;^)

Thanks 75.

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rnabholz
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Re: Puente Formation Diatoms Oblique Stacks

#14 Post by rnabholz » Mon Sep 03, 2018 1:03 pm

PeteM wrote:
rnabholz wrote:I keep looking at the centric in image three.

The "spots" keep alternating between raised and sunken as I view them. If I look and see them as raised, I can look away and back again and they become sunken.

Anybody else, or should I see a doctor? ;^)
Reversals like that are a classic optical illusion. Keep it up and you could become a doctor (your PhD, in visual perception).
Any institution that would bestow a doctorate on me would do such damage to its reputation that it would be worthless. ;^)

Thanks Pete.

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Radazz
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Re: Puente Formation Diatoms Oblique Stacks

#15 Post by Radazz » Mon Sep 03, 2018 3:20 pm

Superb detail!
Thanks for sharing.
Jim
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Re: Puente Formation Diatoms Oblique Stacks

#16 Post by rnabholz » Mon Sep 03, 2018 9:34 pm

Radazz wrote:Superb detail!
Thanks for sharing.
Jim
Thank you Jim

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