I see stars - Asterionella diatoms in dark field
I see stars - Asterionella diatoms in dark field
Hi together,
here some Asterionella diatoms. Cleaned by incineration, milk carton dark field stop on light exit in the foot. 16:1 plan.
I brought the Junior which proves very nice with bright battery illumination with 12V Bosch power tool battery and USB converter. What I miss from the Phomi is the Optovar with high power dry 40:1.
Bob
here some Asterionella diatoms. Cleaned by incineration, milk carton dark field stop on light exit in the foot. 16:1 plan.
I brought the Junior which proves very nice with bright battery illumination with 12V Bosch power tool battery and USB converter. What I miss from the Phomi is the Optovar with high power dry 40:1.
Bob
- Attachments
-
- IMG_20200628_173634-01-01.jpeg (82.14 KiB) Viewed 2780 times
Re: I see stars - Asterionella diatoms in dark field
Great catch, Bob !
Re: I see stars - Asterionella diatoms in dark field
Agree, nice catch
What do you use, 1.25 or 1.6. I find 2 to be too much.What I miss from the Phomi is the Optovar with high power dry 40:1.
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)
Olympus E-P2 (Micro Four Thirds Camera)
Re: I see stars - Asterionella diatoms in dark field
With very small objects it is optical vs. digital magnification. But in most cases I too use max. the 1,6 setting.
-
- Posts: 316
- Joined: Mon Jan 28, 2019 5:17 pm
- Location: Rochester Hills, MI
Re: I see stars - Asterionella diatoms in dark field
Does the scope use 6v or 12?
Do you step down 12v to 6?
What USB converter?
Thanks
Gerard
Do you step down 12v to 6?
What USB converter?
Thanks
Gerard
Re: I see stars - Asterionella diatoms in dark field
It's a typical single 3W Cree LED, powered via USB cable over a 0,47Ohm resistor in row with a wire potentiometer. The USB power source is a Bosch GAA 12V with batteries from 2 to 6 Ah.
- janvangastel
- Posts: 533
- Joined: Mon Dec 03, 2018 7:05 pm
- Location: Huizen, Netherlands
- Contact:
Re: I see stars - Asterionella diatoms in dark field
Looks good Bob!
-
- Posts: 3355
- Joined: Sun Mar 22, 2020 10:06 am
- Location: Winnipeg, Manitoba, Canada
Re: I see stars - Asterionella diatoms in dark field
These look a little like the skeletons of small sponges, but they usually have only three spines.