Search found 201 matches
- Thu Sep 08, 2016 6:23 pm
- Forum: Pictures and Videos
- Topic: Parfocal diatom test
- Replies: 23
- Views: 7629
Re: Parfocal diatom test
I will keep an eye out for any 1.4x tele-converters that i can throw inside the tube but for now i'm more than happy to crop in PP! I wouldn't mess with the tube itself at this point (except as JimT suggested... be sure there are no internal reflections or bright surfaces). It just appeared that yo...
- Thu Sep 08, 2016 7:10 am
- Forum: Pictures and Videos
- Topic: Parfocal diatom test
- Replies: 23
- Views: 7629
Re: Parfocal diatom test
Karl, Yes it looks good. I'm pretty sure that as you work more with this set-up you will indeed see overall better image quality. (BTW...a 40/0.80 is exactly the kind of objective where you really want to avoid significant focus change between viewing eyepieces and camera. What objective is that?) I...
- Tue Sep 06, 2016 7:02 pm
- Forum: Camera systems and imaging
- Topic: Camera Vs Eyepiece
- Replies: 31
- Views: 21304
Re: Camera Vs Eyepiece
OK... So when you say "tube lenses" in your previous answer... and had built in shutters and tube lenses connected to exposure control units. The tube lenses were adjustable for the camera format and offered a magnification of between 2.5x and 5X, depending on the format used ...you are referring to...
- Tue Sep 06, 2016 5:37 am
- Forum: Camera systems and imaging
- Topic: Camera Vs Eyepiece
- Replies: 31
- Views: 21304
Re: Camera Vs Eyepiece
and had built in shutters and tube lenses connected to exposure control units. The tube lenses were adjustable for the camera format and offered a magnification of between 2.5x and 5X The distance from the correcting lens in the head is about to the sensor is around 19 cm. at parfocal. apochronaut,...
- Mon Sep 05, 2016 11:13 pm
- Forum: Pictures and Videos
- Topic: Found among moss leaves - algae?
- Replies: 14
- Views: 4580
Re: Found among moss leaves - algae?
JimT has it. Cyanobacteria (blue-green algae).
- Mon Sep 05, 2016 9:01 pm
- Forum: Microscopes and optics
- Topic: Olympus BH-2 Question. Lamp intensity adjuster. Faulty?
- Replies: 17
- Views: 10958
Re: Olympus BH-2 Question. Lamp intensity adjuster. Faulty?
I suspect lorez is correct, in that repair is needed. These folks were able to repair a faulty power supply on an Olympus BHS for me. It was under "guarantee" by the dealer, l so I don't know the cost involved (you might find it is too high to justify). Rocky Mountain Microscope Corporation 440 S ...
- Mon Sep 05, 2016 8:47 pm
- Forum: Camera systems and imaging
- Topic: Camera Vs Eyepiece
- Replies: 31
- Views: 21304
Re: Camera Vs Eyepiece
I know that there is a better way to go about throwing my camera on the AO20 using a combination of a specific focusing photo eyepiece and photo tube for the Trinoc head but I'm only here for another 2 weeks then work gets in the way, so this quick fix is just to keep me going until I'm back from m...
- Mon Sep 05, 2016 4:52 am
- Forum: Camera systems and imaging
- Topic: Camera Vs Eyepiece
- Replies: 31
- Views: 21304
Re: Camera Vs Eyepiece
Would i be right in assuming we want the best of both worlds...parfocal and a matching FOV? Yes, if possible that should be the goal (or at least as close as it is reasonably possible). Both are pretty important in the overall scheme of things if you are trying to maximize picture quality. Being re...
- Sat Sep 03, 2016 11:51 pm
- Forum: Pictures and Videos
- Topic: Water boatman (Hemiptera: Corixidae) legs
- Replies: 5
- Views: 2650
Water boatman (Hemiptera: Corixidae) legs
The hind legs of the water boatman are very specialized, enabling it to be a powerful swimmer. They have a variety of special hairs that pivot and flatten against the leg on the forward stroke to provide minimum resistance, and then pivot and flare open forming a paddle with a large "surface area" o...
- Sat Sep 03, 2016 10:45 pm
- Forum: Camera systems and imaging
- Topic: Camera Vs Eyepiece
- Replies: 31
- Views: 21304
Re: Camera Vs Eyepiece
This discussion seems to have split has split into two different (but related) paths. Through the eyepiece everything is crisp and sharp but via the camera/tablet its clunkier...the cell wall lines look thicker, it doesn't reach the same pinoint detail that i get through the eyepiece. I think Tom Jo...
- Wed Aug 24, 2016 6:29 am
- Forum: Pictures and Videos
- Topic: Floscularia ringens
- Replies: 10
- Views: 4459
Floscularia ringens
I'm adding another post today since the primary point of the Campanella post was the interesting cilia motion that was "frozen" by using electronic flash. With this critter the cilia motion a a key attraction as well. This is a favorite creature for me. It is mesmerizing to watch when feeding, and t...
- Wed Aug 24, 2016 5:57 am
- Forum: Pictures and Videos
- Topic: Campanella umbellaria
- Replies: 10
- Views: 4148
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 ...
- Sat Aug 20, 2016 6:15 pm
- Forum: Illumination Techniques
- Topic: More Diatom Illumination Experimentation
- Replies: 9
- Views: 6371
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...
- Sun Aug 14, 2016 6:24 am
- Forum: Pictures and Videos
- Topic: Testate Amoeba
- Replies: 12
- Views: 5361
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...
- Sat Aug 13, 2016 8:52 pm
- Forum: Pictures and Videos
- Topic: Testate Amoeba
- Replies: 12
- Views: 5361
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...
- Sat Aug 13, 2016 6:58 pm
- Forum: Pictures and Videos
- Topic: Foraminifera Pix
- Replies: 9
- Views: 3389
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.
- Sat Aug 13, 2016 6:41 pm
- Forum: Pictures and Videos
- Topic: Something Different
- Replies: 11
- Views: 3819
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.
- Sat Aug 13, 2016 6:39 pm
- Forum: Pictures and Videos
- Topic: Paramecia (video)
- Replies: 19
- Views: 5972
Re: Paramecia (video)
Really nice! A pleasure to watch.
- Sat Aug 13, 2016 6:34 pm
- Forum: Pictures and Videos
- Topic: Stentor Video
- Replies: 4
- Views: 1988
Re: Stentor Video
Always mildly amusing how cautious they are after they get startled and contract.
- Sat Aug 13, 2016 6:31 pm
- Forum: Pictures and Videos
- Topic: Onion Thrips on clover flower
- Replies: 6
- Views: 2703
Re: Onion Thrips on clover flower
This is a very appealing image. Wonderful shapes and forms.
- Sat Aug 13, 2016 6:28 pm
- Forum: Pictures and Videos
- Topic: Some more oil play
- Replies: 6
- Views: 2397
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).
(BTW... I notice the same "spot" pattern on these images... might be time to carefully clean the sensor).
- Sat Aug 13, 2016 6:23 pm
- Forum: Pictures and Videos
- Topic: Desmids continued...
- Replies: 10
- Views: 3621
Re: Desmids continued...
Really nice look at the surface texture in that second specimen. Beautiful.
- 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: 6958
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
- Sat Aug 13, 2016 6:14 pm
- Forum: Pictures and Videos
- Topic: Botryococcus (yet again)
- Replies: 11
- Views: 3524
Re: Botryococcus (yet again)
Very crisp and clean! Great detail to study.
- Sat Aug 13, 2016 6:10 pm
- Forum: Pictures and Videos
- Topic: Rotifer Philodina and Friend Video
- Replies: 7
- Views: 3022
Re: Rotifer Philodina and Friend Video
Really nice look as the mastax "chomping" away... normally don't see that so well.
- Sat Aug 13, 2016 6:02 pm
- Forum: Pictures and Videos
- Topic: Sunday Afternoon
- Replies: 5
- Views: 2331
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.
- Fri Aug 12, 2016 7:51 pm
- Forum: Microscopes and optics
- Topic: Multicoatings and narrow angle scatter
- Replies: 2
- Views: 2408
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...
- Sun Aug 07, 2016 6:37 am
- Forum: Pictures and Videos
- Topic: Campylodiscus
- Replies: 10
- Views: 4050
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...
- Thu Aug 04, 2016 3:49 am
- Forum: Pictures and Videos
- Topic: Puget Sound (WA) diatoms
- Replies: 19
- Views: 6647
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...
- Wed Aug 03, 2016 9:40 pm
- Forum: Identification help
- Topic: Thousands of tiny bacteria?
- Replies: 13
- Views: 6431
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.
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.