Search found 160 matches

by c-krebs
Wed Aug 24, 2016 5:57 am
Forum: Pictures and Videos
Topic: Campanella umbellaria
Replies: 10
Views: 1143

Campanella umbellaria

These are sessile colonial peritrich ciliates. (Although I will often find them singly or in small groups or two or three). The "bell" is larger than the more commonly seen vorticella (about 200-260 μm long, 100 μm wide), and the oral cilia, which make 4-6 turns around the peristome are fascinating ...
by c-krebs
Sat Aug 20, 2016 6:15 pm
Forum: Illumination Techniques
Topic: More Diatom Illumination Experimentation
Replies: 9
Views: 3125

Re: More Diatom Illumination Experimentation

ve been reading an article by David Walker (micscape magazine, August 2016) on the use of halo ring led lights for phase, dark field and rheinberg on "upright" microscopes. Does anyone on the forum any experience of this? I've tried them (primarily for darkfield experimentation... no phase). They d...
by c-krebs
Sun Aug 14, 2016 6:24 am
Forum: Pictures and Videos
Topic: Testate Amoeba
Replies: 12
Views: 1519

Re: Testate Amoeba

Thank you for all the kind remarks. any chance of some scale on the images? The first image has the size in the text above it... 140 microns x 50 microns. It was taken with a 60X objective at a total magnification of 126X (on APS-C Canon sensor). The second one, the Arcella, has a diameter of 128 mi...
by c-krebs
Sat Aug 13, 2016 8:52 pm
Forum: Pictures and Videos
Topic: Testate Amoeba
Replies: 12
Views: 1519

Testate Amoeba

Kurt's recent foraminifera shots reminded me how fascinated I was with amoeboid protists that made "shells" or "tests". For a very long time an amoeba was, to me, a little blob of protoplasm that oozed about. When I began finding testate amoeba I was really amazed. Hard for me to fathom such wonderf...
by c-krebs
Sat Aug 13, 2016 6:58 pm
Forum: Pictures and Videos
Topic: Foraminifera Pix
Replies: 9
Views: 729

Re: Foraminifera Pix

These really are fascinating little creatures. Thanks for showing these. I've only found 1 or 2 live ones in my plankton net over the years.
by c-krebs
Sat Aug 13, 2016 6:41 pm
Forum: Pictures and Videos
Topic: Something Different
Replies: 11
Views: 1219

Re: Something Different

Very interesting and graphic. I suppose you should not look at your food this closely... although it might help m e lose some weight if I did. ;)
by c-krebs
Sat Aug 13, 2016 6:39 pm
Forum: Pictures and Videos
Topic: Paramecia (video)
Replies: 19
Views: 1551

Re: Paramecia (video)

Really nice! A pleasure to watch.
by c-krebs
Sat Aug 13, 2016 6:34 pm
Forum: Pictures and Videos
Topic: Stentor Video
Replies: 4
Views: 517

Re: Stentor Video

Always mildly amusing how cautious they are after they get startled and contract.
by c-krebs
Sat Aug 13, 2016 6:31 pm
Forum: Pictures and Videos
Topic: Onion Thrips on clover flower
Replies: 6
Views: 780

Re: Onion Thrips on clover flower

This is a very appealing image. Wonderful shapes and forms.
by c-krebs
Sat Aug 13, 2016 6:28 pm
Forum: Pictures and Videos
Topic: Some more oil play
Replies: 6
Views: 490

Re: Some more oil play

Very nice work. With these subjects, at these magnifications, a very small stack (as small as 2 or 3 images) can make a big difference as well.

(BTW... I notice the same "spot" pattern on these images... might be time to carefully clean the sensor).
by c-krebs
Sat Aug 13, 2016 6:23 pm
Forum: Pictures and Videos
Topic: Desmids continued...
Replies: 10
Views: 973

Re: Desmids continued...

Really nice look at the surface texture in that second specimen. Beautiful.
by c-krebs
Sat Aug 13, 2016 6:18 pm
Forum: Pictures and Videos
Topic: Ammonium Sulphate melt yields some impressive bifiringence: Two new pics. And one more...
Replies: 22
Views: 1874

Re: Ammonium Sulphate melt yields some impressive bifiringence: Two new pics. And one more...

Really nice. First thing that popped into my head on the first image was Aurora Borealis
by c-krebs
Sat Aug 13, 2016 6:14 pm
Forum: Pictures and Videos
Topic: Botryococcus (yet again)
Replies: 11
Views: 828

Re: Botryococcus (yet again)

Very crisp and clean! Great detail to study.
by c-krebs
Sat Aug 13, 2016 6:10 pm
Forum: Pictures and Videos
Topic: Rotifer Philodina and Friend Video
Replies: 7
Views: 704

Re: Rotifer Philodina and Friend Video

Really nice look as the mastax "chomping" away... normally don't see that so well.
by c-krebs
Sat Aug 13, 2016 6:02 pm
Forum: Pictures and Videos
Topic: Sunday Afternoon
Replies: 5
Views: 571

Re: Sunday Afternoon

That last shot is an egg mass. Inside they do look like sausages folded over. I found exactly the same thing a couple years ago but was not able to get any ID info.
by c-krebs
Fri Aug 12, 2016 7:51 pm
Forum: Microscopes and optics
Topic: Multicoatings and narrow angle scatter
Replies: 2
Views: 1166

Re: Multicoatings and narrow angle scatter

I ask this because none of my current microscopes have multi-coated optics, and I'm wondering if it's worth upgrading to a scope with multi-coatings. I wouldn't jump to a new scope just for that reason. Depending on the design of the optics a good single coating can be quite effective. But as optic...
by c-krebs
Sun Aug 07, 2016 6:37 am
Forum: Pictures and Videos
Topic: Campylodiscus
Replies: 10
Views: 1094

Re: Campylodiscus

Great fun! Really nice images! In fact, if you even could make a "perfect" stack and get everything sharp you probably wouldn't want to. Notice how, especially in the second image the out-of-focus sections really add dimension and provide great "shape" clues. Sometimes you'll shoot a complete z-stac...
by c-krebs
Thu Aug 04, 2016 3:49 am
Forum: Pictures and Videos
Topic: Puget Sound (WA) diatoms
Replies: 19
Views: 1892

Re: Puget Sound (WA) diatoms

Might you pass along where you got small petri dishes? The only ones I can find are extremely expensive. These are plastic (polystyrene). I purchased a couple of different sizes from a company called "lightlabsusa.com". The smallest ones I have are 35mm diameter but I find them very handy when look...
by c-krebs
Wed Aug 03, 2016 9:40 pm
Forum: Identification help
Topic: Thousands of tiny bacteria?
Replies: 13
Views: 2488

Re: Thousands of tiny bacteria?

Really need a better picture (or at least some information about the size).

But I'll take a wild stab and guess that they could possibly be a small ostracod (seed shrimp). They are often found in very large numbers and move about rapidly. Some small species are only 200 microns long.
by c-krebs
Wed Aug 03, 2016 6:22 pm
Forum: Pictures and Videos
Topic: Puget Sound (WA) diatoms
Replies: 19
Views: 1892

Re: Puget Sound (WA) diatoms

Thanks for the kind remarks! What illumination was used for photos #1 and #2? Phase? The first two used a mix of lighting. I used the MM-11/Olympus "hybrid" scope that I showed in this thread: http://www.microbehunter.com/microscopy-forum/viewtopic.php?f=6&t=3295&p=29145 This gives me a great deal o...
by c-krebs
Wed Aug 03, 2016 5:47 pm
Forum: Pictures and Videos
Topic: Green Diatom
Replies: 9
Views: 1386

Re: Green Diatom

I would still feel a lot better if you photographed an evenly illuminated white or grey opaque piece of paper/cardboard on the microscope stage. (Or perhaps point the camera+adapter toward an evenly illuminated neutral colored wall several feet away). The color you used is too intense... you want so...
by c-krebs
Wed Aug 03, 2016 6:29 am
Forum: Pictures and Videos
Topic: Parsley Stem
Replies: 12
Views: 1733

Re: Parsley Stem

Really nice.

You guys are going to make me rummage through boxes to find my old hand microtome. ;)
by c-krebs
Wed Aug 03, 2016 6:26 am
Forum: Pictures and Videos
Topic: Liverworts, a new adventure unfolds...
Replies: 16
Views: 2468

Re: Liverworts, a new adventure unfolds...

A lot of work, but the results are excellent. And if you enjoy the entire process, all the better.
by c-krebs
Wed Aug 03, 2016 6:23 am
Forum: Pictures and Videos
Topic: Continuing Adventures With Stacking: Pollen!
Replies: 15
Views: 1776

Re: Continuing Adventures With Stacking: Pollen!

Really well done! This is a subject that is frustrating to do this nicely. Actually brings back memories from many (many!) years ago. When I was in 3rd or 4th grade I had a Swift monocular scope. As a science project I went around and collected all types of pollen and mounted slides with Canada bals...
by c-krebs
Wed Aug 03, 2016 6:11 am
Forum: Pictures and Videos
Topic: Acarien
Replies: 10
Views: 1340

Re: Acarien

Very nice! Good job!
(Makes me feel itchy :shock:)
by c-krebs
Wed Aug 03, 2016 6:07 am
Forum: Pictures and Videos
Topic: Craticula, Navicula and Fragilaria in Phase Contrast
Replies: 18
Views: 2329

Re: Craticula, Navicula and Fragilaria in Phase Contrast

These are really nice!

Have to say, you've got that 100X phase contrast really working well.
by c-krebs
Wed Aug 03, 2016 6:05 am
Forum: Pictures and Videos
Topic: Green Diatom
Replies: 9
Views: 1386

Re: Green Diatom

I think you're going to like your new objective... looks very good right out to the corners. You should try to determine if the uneven background is a camera or a microscope illumination "thing". You might try using the 4x (large working distance)and putting a piece of opaque white paper on the stag...
by c-krebs
Wed Aug 03, 2016 5:57 am
Forum: Pictures and Videos
Topic: Closterium
Replies: 10
Views: 1556

Re: Closterium

Very nicely done! Great "internal" detail.
by c-krebs
Wed Aug 03, 2016 5:53 am
Forum: Pictures and Videos
Topic: Puget Sound (WA) diatoms
Replies: 19
Views: 1892

Puget Sound (WA) diatoms

The first four images were collected in Puget Sound, WA using a small plankton net. The last was a piece of alga I scraped off a pier. I have photographed the species (Coscinodiscus sp.) in the first two images several times. On this particular outing there must have been a huge bloom because every ...
by c-krebs
Wed Aug 03, 2016 5:29 am
Forum: Pictures and Videos
Topic: Some kind of worm or larva
Replies: 6
Views: 1039

Re: Some kind of worm or larva

Looks like an Aeolosoma worm. (Many species..but possibly Aeolosoma hemprichi)
kit1980 wrote: Pretty scary
Yup... eventually the bacteria and worms win :shock: