Walfisch Bay S. Africa diatomes
Walfisch Bay S. Africa diatomes
A couple of shots from an antique slide labeled
Circle Group
Diatomeceae
Walfisch Bay
S. Africa
Styrax
Olympus IX70 10x HMC EOS 7D
Seven image stack
Olympus IX70 10x HMC EOS 7D
Fifteen image stack
Enjoy
Radazz
Circle Group
Diatomeceae
Walfisch Bay
S. Africa
Styrax
Olympus IX70 10x HMC EOS 7D
Seven image stack
Olympus IX70 10x HMC EOS 7D
Fifteen image stack
Enjoy
Radazz
Arnold, Missouri
Olympus IX70
Olympus BX40
Olympus SZ40
Olympus IX70
Olympus BX40
Olympus SZ40
Re: Walfisch Bay S. Africa diatomes
That is an interesting slide. Any chance you can get a bit closer to some of the diatoms.
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)
Olympus E-P2 (Micro Four Thirds Camera)
Re: Walfisch Bay S. Africa diatomes
Sure. I was concerned more with the composition.75RR wrote:That is an interesting slide. Any chance you can get a bit closer to some of the diatoms.
Which did you have in mind?
Radazz
Arnold, Missouri
Olympus IX70
Olympus BX40
Olympus SZ40
Olympus IX70
Olympus BX40
Olympus SZ40
Re: Walfisch Bay S. Africa diatomes
Thanks. The second largest in the first image if you can. Like the star shape in the center
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)
Olympus E-P2 (Micro Four Thirds Camera)
Re: Walfisch Bay S. Africa diatomes
Here it is, 75
30x HMC (300x)
Not a star after all.
Saw this one while looking for the one you wanted. 4 image stack
Radazz
30x HMC (300x)
Not a star after all.
Saw this one while looking for the one you wanted. 4 image stack
Radazz
Last edited by Radazz on Mon Jan 14, 2019 2:31 am, edited 1 time in total.
Arnold, Missouri
Olympus IX70
Olympus BX40
Olympus SZ40
Olympus IX70
Olympus BX40
Olympus SZ40
Re: Walfisch Bay S. Africa diatomes
Thanks, those are great images. Fantastic detail.
Indeed. Have to admit I am surprised though, still, can't argue with the larger image.Not a star after all.
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)
Olympus E-P2 (Micro Four Thirds Camera)
Re: Walfisch Bay S. Africa diatomes
What structure causes this splendid spectrum of colors? it is not common among diatoms, is it?
Re: Walfisch Bay S. Africa diatomes
I think it may be refraction. I see much more brilliant colors with phase contrast or HMC, but even closing the iris in brightfield will bring out some color.
I also see more color in antique diatom slides than in brand new slides.
It’s possible that the mountant and it’s age affect things as well.
I know nothing,
Radazz
I also see more color in antique diatom slides than in brand new slides.
It’s possible that the mountant and it’s age affect things as well.
I know nothing,
Radazz
Arnold, Missouri
Olympus IX70
Olympus BX40
Olympus SZ40
Olympus IX70
Olympus BX40
Olympus SZ40
Re: Walfisch Bay S. Africa diatomes
I was wondering if the rows of tiny holes (punctae?), so close together, might be acting like a diffraction grating, separating the colors like the reflections of light sources off a CD-ROM disk, which can be used as a poor man's diffraction grating?
But the colors disappear under high magnification, and I don't know if that would happen with a diffraction grating.
But the colors disappear under high magnification, and I don't know if that would happen with a diffraction grating.
Rick
A/O 10 Series Microstar
A/O 4 Series Microstar
A/O 4 Series Phasestar
A/O 4 Series Apostar
A/O Cycloptic Stereo
Several old monocular scopes in more or less decrepit but usable condition
A/O 10 Series Microstar
A/O 4 Series Microstar
A/O 4 Series Phasestar
A/O 4 Series Apostar
A/O Cycloptic Stereo
Several old monocular scopes in more or less decrepit but usable condition
Re: Walfisch Bay S. Africa diatomes
How well the sample is cleaned could matter a great deal.
I ordered one of Klaus’ 8 forms test slides, we’ll see what perfect specimens look like.
Radazz
I ordered one of Klaus’ 8 forms test slides, we’ll see what perfect specimens look like.
Radazz
Arnold, Missouri
Olympus IX70
Olympus BX40
Olympus SZ40
Olympus IX70
Olympus BX40
Olympus SZ40