Search found 147 matches
- Fri Sep 22, 2017 9:10 am
- Forum: Pictures and Videos
- Topic: Arcella dentata
- Replies: 12
- Views: 5727
Re: Arcella dentata
Hello, and thanks for your kind comments. @Kurt and HKV: You know that most testacea-tests are quite fragile, and I hate to crush them! I therefore use concave slides, with cover glass. This often gives me the chance to rotate and turn my objects. In this case the (empty) shell was leaning on a bit ...
- Thu Sep 21, 2017 9:28 am
- Forum: Pictures and Videos
- Topic: Arcella dentata
- Replies: 12
- Views: 5727
Arcella dentata
Hello,
this is an Arcella dentata from an unusual angle - oblique dorsal, showing the crown shape:
One must be lucky to get a side view of one of the discoid Arcella species'.
Stack of 40, 40x achro.
Greetings,
Hans
this is an Arcella dentata from an unusual angle - oblique dorsal, showing the crown shape:
One must be lucky to get a side view of one of the discoid Arcella species'.
Stack of 40, 40x achro.
Greetings,
Hans
- Sun Sep 10, 2017 5:02 pm
- Forum: Pictures and Videos
- Topic: Amphora Diatom
- Replies: 8
- Views: 4926
Re: Amphora Diatom
Hello Actinophrys, You are of course right, my second specimen (the sideview) is definitely a Cymbella sp. Here is a drawing by Hustedt (1930), showing the typical shape of the cymbella-chloroplasts: http://www.hans-rothauscher.de/testaceen/forum/cymbella.jpg I am not too experienced as far as diato...
- Sun Sep 10, 2017 9:57 am
- Forum: Pictures and Videos
- Topic: Rotaria, amoeba, diatom
- Replies: 13
- Views: 6680
Re: Rotaria, amoeba, diatom
Hello Charles,
the rotifer and the diatom are splendid, I assume DIC?
Have you been able to identify the amoeba? The position makes identification difficult, could be a Lesquereusia??
Cheers,
Hans
the rotifer and the diatom are splendid, I assume DIC?
Have you been able to identify the amoeba? The position makes identification difficult, could be a Lesquereusia??
Cheers,
Hans
- Sun Sep 10, 2017 9:47 am
- Forum: Pictures and Videos
- Topic: Amphora Diatom
- Replies: 8
- Views: 4926
Re: Amphora and Campylodiscus Diatoms
Hello, and thanks for your kind comments. @BillT: They were all on one slide. Books told me its the same species. But seebelow postings! @JohnB: Generally my equipment is not overgood with Diatoms (I'm specialising in testate amoebae). The fine structure of most silicon cells require better equipmen...
- Sat Sep 09, 2017 9:10 am
- Forum: Pictures and Videos
- Topic: Amphora Diatom
- Replies: 8
- Views: 4926
Amphora Diatom
Hello, I am showing a pretty Amphora cf. copulata: http://www.hans-rothauscher.de/testaceen/forum/Amphora%20ovalis_60.jpg Size 60 µm, 60x Achromat, transmitted light, stack of 3. I was wrong here, the sideview is of a cymbella, not an amphora: http://www.hans-rothauscher.de/testaceen/forum/Amphora_g...
- Sat Aug 19, 2017 5:07 pm
- Forum: Pictures and Videos
- Topic: Vampyrella Amoeba
- Replies: 15
- Views: 6404
Re: Vampyrella Amoeba
Thanks, Francisco,
Hans
Hans
- Fri Aug 18, 2017 8:03 pm
- Forum: Pictures and Videos
- Topic: Vampyrella Amoeba
- Replies: 15
- Views: 6404
Re: Vampyrella Amoeba
Hello Francisco, very interesting video. Have you seen this instructive video https://tib.flowcenter.de/mfc/medialink/3/dee0e4a5f8e060fa95560f2415839d17286c5948495580e61311f48899686ed0cb/VTS_01_1.mp4 by Norbert Hülsmann? Your specimen was probably about to penetrate a cell of the algae threat in ord...
- Fri Aug 18, 2017 10:19 am
- Forum: Pictures and Videos
- Topic: Crawling Difflugia
- Replies: 8
- Views: 3612
Re: Crawling Difflugia
Hello, and thanks for your kind comments. @75RR and @KurtM: The Zeiss KF2 (ex Junior) has a very basic condenser with single lever control. At a certain position of the lever and with a bit of juggeling you get an oblique light effect. It is a poor-mans-DIC, with some drawbacks of course. One is a s...
- Sun Aug 13, 2017 10:13 am
- Forum: Pictures and Videos
- Topic: Crawling Difflugia
- Replies: 8
- Views: 3612
Crawling Difflugia
Hello,
this is an snapshot of a very active 260 µm long Difflugia capreolata, filled with zoochlorella:
(25x Zeiss Achromat, oblique-light, single focus)
Greetings,
Hans
this is an snapshot of a very active 260 µm long Difflugia capreolata, filled with zoochlorella:
(25x Zeiss Achromat, oblique-light, single focus)
Greetings,
Hans
- Sat Jul 01, 2017 4:35 pm
- Forum: About the website, the magazine and this forum
- Topic: mystery organism in pain
- Replies: 2
- Views: 9546
Re: mystery organism in pain
Hi Crusty,
I cannot see the photo,
Hans
I cannot see the photo,
Hans
- Fri Jun 23, 2017 5:44 pm
- Forum: Pictures and Videos
- Topic: Nebela and Euglypha
- Replies: 4
- Views: 2551
Nebela and Euglypha
Nebela tests are in general flat pyrishaped. They reinforce their test with shell plates robbed off Euglyphids and, like this specimen, also sometimes with Heliozoa Axopodia. http://www.hans-rothauscher.de/testaceen/forum/nebelascharf600.jpg Below are two examples of scale robberies: http://www.hans...
- Thu Mar 30, 2017 10:15 am
- Forum: Introduce yourself
- Topic: CMOS Microscope camera adapter
- Replies: 2
- Views: 3098
Re: CMOS Microscope camera adapter
Hello Istvan, ToupTec sell adapters for this kind of cameras with C-Mount adaption. They should fit your requirement. Types depend on sensor chip size. Manually focusable ones adjust for parfocality. Visit http://www.touptek.com/product/showproduct.php?lang=en&id=79. They look like this (photo from ...
- Wed Mar 29, 2017 12:51 pm
- Forum: Pictures and Videos
- Topic: Testate Amoeba
- Replies: 10
- Views: 5422
Re: Testate Amoeba
Hello btschumi, The third one is definitely Difflugia corona. The collar of the other two look more like Difflugia lithoplites. Ferry Siemensma writes in his arcella.nl : "not seldom together with Difflugia corona and Difflugia capreolata." How big were your specimen? Greetings, Hans PS Interesting,...
- Sat Mar 25, 2017 6:39 pm
- Forum: Identification help
- Topic: A testate amoeba?
- Replies: 6
- Views: 5340
Re: A testate amoeba?
Hello,
The lower one looks to me like a tardigrade egg.
See http://www.baertierchen.de/wb_okt00.html.
Regards,
Hans
The lower one looks to me like a tardigrade egg.
See http://www.baertierchen.de/wb_okt00.html.
Regards,
Hans
- Sat Mar 11, 2017 1:03 pm
- Forum: Pictures and Videos
- Topic: Xanthidium antilopaeum
- Replies: 2
- Views: 2282
Xanthidium antilopaeum
Hello Forum,
this is a 43 µm high (both semi cells without spines) Xanthidium cf. antilopaeum.
Bright field 60x achro stack of 6. They prefer oligothrophic acid waters.
Regards,
Hans
this is a 43 µm high (both semi cells without spines) Xanthidium cf. antilopaeum.
Bright field 60x achro stack of 6. They prefer oligothrophic acid waters.
Regards,
Hans
- Thu Feb 02, 2017 10:00 am
- Forum: Identification help
- Topic: Two eggs in capsule?
- Replies: 0
- Views: 2201
Two eggs in capsule?
Hello Forum, this is obviously an egg capsule of some kind. http://www.hans-rothauscher.de/testaceen/forum/2eier.jpg The capsule is about 55 µm in diameter. This is a stack of a few focus layers, to show the spherical capsule with spines and the honeycomb surface of the eggs. (60x achro dry objectiv...
- Sun Jan 08, 2017 2:23 pm
- Forum: Pictures and Videos
- Topic: Arcella and algae
- Replies: 2
- Views: 1667
Arcella and algae
Hello,
this is the bottom view of a nice empty Arcella presumably vulgaris, 95 µm.
60x Achromat, Stack of 6 layers.
A few more focal planes would have improved overall sharpness.
Greetings,
Hans
this is the bottom view of a nice empty Arcella presumably vulgaris, 95 µm.
60x Achromat, Stack of 6 layers.
A few more focal planes would have improved overall sharpness.
Greetings,
Hans
- Thu Jan 05, 2017 11:39 am
- Forum: Camera systems and imaging
- Topic: How much touchup is "legal"?
- Replies: 15
- Views: 7741
Re: How much touchup is "legal"?
Hello btschumy,
there really is a lot of debris in your first image.
In your example I would prefer a cut-out enlargement of the main object and a moderate touch-up the background to emphazise the main motive.
To me your second image definitely received too much touch-up.
Greetings,
Hans
there really is a lot of debris in your first image.
In your example I would prefer a cut-out enlargement of the main object and a moderate touch-up the background to emphazise the main motive.
To me your second image definitely received too much touch-up.
Greetings,
Hans
- Thu Dec 08, 2016 6:32 pm
- Forum: Pictures and Videos
- Topic: Arcella alive
- Replies: 4
- Views: 2450
Re: Arcella alive
Thanks,
@Charlie: It is one focal plane. Details from other planes would spoil the image, if stacked.
@gekko: Yoour http://micritter.imgur.com/ does not work with me. If I click on a thumbnail it gives me a dark screen only, pity.
Hans
@Charlie: It is one focal plane. Details from other planes would spoil the image, if stacked.
@gekko: Yoour http://micritter.imgur.com/ does not work with me. If I click on a thumbnail it gives me a dark screen only, pity.
Hans
- Thu Dec 08, 2016 12:41 pm
- Forum: Pictures and Videos
- Topic: Arcella alive
- Replies: 4
- Views: 2450
Arcella alive
Hello, I found this 104 µm wide Arcella cf. vulgaris today in sphagnum. After division new arcella-tests are hyaline. With age they get brownish and opaque, and you cannot look inside. This specimen is still sufficiently hyaline. http://www.hans-rothauscher.de/testaceen/forum/arcella.jpg The plasma ...
- Wed Dec 07, 2016 12:32 pm
- Forum: Camera systems and imaging
- Topic: focusable photo relay lens... anyone use these can give advice?
- Replies: 21
- Views: 16243
Re: focusable photo relay lens... anyone use these can give advice?
@bilben:
Hans
I believe this is a combination of an adapter to the proprietary lens mount of a DSLR and a housing for an ocular. Without any optics, just tubes.My camera on my trinocular is attached via something similar to this
http://www.ebay.com/itm/CANON-DSLR-SLR- ... 0770947923
Hans
- Wed Dec 07, 2016 12:24 pm
- Forum: Camera systems and imaging
- Topic: focusable photo relay lens... anyone use these can give advice?
- Replies: 21
- Views: 16243
Re: focusable photo relay lens... anyone use these can give advice?
Hello, ToupTec make (or rebrand?) this type of adapters. See http://www.touptek.com/product/product.php?lang=en&class2=56 AMA for adjustable, FMA for fixed, followed by the magnification factor. They suggest: The possible maximum size for the image sensor is 18mmX0.37=6.66mm for the 0.37X camera ada...
- Mon Dec 05, 2016 5:49 pm
- Forum: Pictures and Videos
- Topic: Peridinium
- Replies: 7
- Views: 3050
Re: Peridinium
Hello Hakan,
the second one is unmistakable.
Nice image.
Hans
the second one is unmistakable.
Nice image.
Hans
- Sun Dec 04, 2016 9:06 am
- Forum: Pictures and Videos
- Topic: Testate amoebae ?
- Replies: 8
- Views: 3358
Re: Testate amoebae ?
Hi 75RR,
definitely no Spumochlamys.
Could be a very deformed Arcella, one of the larger species (discoides, megastoma, artocrea). Only a guess.
Regards,
Hans
definitely no Spumochlamys.
Could be a very deformed Arcella, one of the larger species (discoides, megastoma, artocrea). Only a guess.
Regards,
Hans
- Fri Dec 02, 2016 6:35 pm
- Forum: Pictures and Videos
- Topic: Testate amoeba Lesquereusia
- Replies: 12
- Views: 5047
Re: Testate amoeba Lesquereusia
Hi 75RR, If the sphagnum is floating or soaking wet you just squeeze it gently: http://www.hans-rothauscher.de/testaceen/forum/quetsch.jpg or if the sphagnum is very dense, use the lid of your sample bottle: http://www.hans-rothauscher.de/testaceen/forum/deckel.jpg Dry sphagnum soak in water, wait a...
- Fri Dec 02, 2016 6:30 pm
- Forum: Pictures and Videos
- Topic: Arcella
- Replies: 10
- Views: 4422
Re: Arcella
Hello 75RR, this is unusual, as Arcella never protect their test with foreign objects. The honeycomb as shown well in the DIC is the structure of a clean Arcella. There appears to be a lot of litter/debris on top. Thanks for the comparison, Oblique and DIC win. Unfortunately I can only do brightfiel...
- Thu Dec 01, 2016 6:25 pm
- Forum: Pictures and Videos
- Topic: Testate amoeba Lesquereusia
- Replies: 12
- Views: 5047
Re: Testate amoeba Lesquereusia
Hello, pleased that you like the image. @zzffn: Permanent mounts of testate amoebae are done by many people. You need of course a clean specimen. Wilfried Schoenborn writes (my translation) "preparation takes place on the slide. Isolate the specimen, rinse it in 70% alcohol to get rid of water. Moun...
- Thu Dec 01, 2016 11:27 am
- Forum: Pictures and Videos
- Topic: Testate amoeba Lesquereusia
- Replies: 12
- Views: 5047
Testate amoeba Lesquereusia
Hello, I would like to show you this interesting 144 µm high asymmetrically shaped Lesquereusia spiralis. The worm-like objects covering the surface are silicious rods produced by the organism (idiosomes). These are stored within the shell until it divides and passes them on to the new test. http://...
- Thu Dec 01, 2016 11:11 am
- Forum: Pictures and Videos
- Topic: Arcella dentata
- Replies: 18
- Views: 7404
Re: Arcella dentata
Hello Johann,
a beautiful creature, and beautiful picture. I too prefer the BF in this example. DIC does not give any extra information.
Do you mind if I add to your thread a side view image of this crown shaped organism?
Regards,
Hans
a beautiful creature, and beautiful picture. I too prefer the BF in this example. DIC does not give any extra information.
Do you mind if I add to your thread a side view image of this crown shaped organism?
Regards,
Hans