Whelk Radula
-
- Posts: 119
- Joined: Mon Jul 19, 2021 2:20 am
- Location: 192.0.0.1
- Contact:
Whelk Radula
4x with PE2 = 8x
XPL w/ 1/4 λ plate. Z-stacking.
Enjoy.
Re: Whelk Radula
Exceptionally clean background, has the background been removed?
In addition, I am learning "RETARDATION PLATES".
Does the sentence "it will add or subtract about 137 nm (550/4=137.5 nm)" mean to shift the spectrum?
In addition, I am learning "RETARDATION PLATES".
Does the sentence "it will add or subtract about 137 nm (550/4=137.5 nm)" mean to shift the spectrum?
Micrographers from China, thanks to the forum for providing a platform for exchange
-
- Posts: 119
- Joined: Mon Jul 19, 2021 2:20 am
- Location: 192.0.0.1
- Contact:
Re: Whelk Radula
Yeah, I cheated a little by replacing the dirty background.
The waveplates produce an optical path difference. Petrologists and material scientists use various compensators with the assistance of a Michel-Lévy Interference Chart to obtain the birefringence of the sample which then allows them to determine the material they are looking at. This is vital in the fields of mining engineering and various material science disciplines.
For me, it looks nice in photos. I do not own a petrological microscope.
Re: Whelk Radula
https://www.edc.uri.edu/restoration/htm ... rt/new.htm
Did you find a Whelk first?
And where about?
Very interesting!
-Dennis
Did you find a Whelk first?
And where about?
Very interesting!
-Dennis
Re: Whelk Radula
Very nice image . . . thanks.
Keep some bubbles to the background and, here in the US, we'd ID it as a Lawrence Whelk.
Keep some bubbles to the background and, here in the US, we'd ID it as a Lawrence Whelk.
Re: Whelk Radula
Macro_Cosmos wrote: ↑Mon Oct 24, 2022 2:57 am...I cheated a little by replacing the dirty background.
Not cheating at all. Adding or subtracting pertinent information might be, but rubbing out needless distraction to better present the subject is OK. Says me, anyway.
That's a spectacular image, thanks for posting!
Cheers,
Kurt Maurer
League City, Texas
email: ngc704(at)gmail(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/
Kurt Maurer
League City, Texas
email: ngc704(at)gmail(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/
-
- Posts: 119
- Joined: Mon Jul 19, 2021 2:20 am
- Location: 192.0.0.1
- Contact:
Re: Whelk Radula
I do add and subtract information occasionally as well. Diatoms often have imperfections or mountant inclusions that I do not want. I have stamped out cracks in diatoms, fibres in slides, and the example goes on. I would say it is an acceptable touchup, I have never totally reworked something to a point that it looked completely different to the original z-stack.KurtM wrote: ↑Tue Oct 25, 2022 1:05 amMacro_Cosmos wrote: ↑Mon Oct 24, 2022 2:57 am...I cheated a little by replacing the dirty background.
Not cheating at all. Adding or subtracting pertinent information might be, but rubbing out needless distraction to better present the subject is OK. Says me, anyway.
That's a spectacular image, thanks for posting!
No whelks were harmed! Well, not by me anyway. This was a vintage slide by the mounter Norman.Dennis wrote: ↑Mon Oct 24, 2022 1:46 pmhttps://www.edc.uri.edu/restoration/htm ... rt/new.htm
Did you find a Whelk first?
And where about?
Very interesting!
-Dennis