Search found 64 matches

by dtrinh
Mon Dec 04, 2023 8:29 am
Forum: Identification help
Topic: A budding Ciliate?
Replies: 2
Views: 773

Re: A budding Ciliate?

Hi all,
It is in fact a Stentor in the mobile form. The next day I saw a similar one without the budding. But I am still not sure if it is budding for reproduction. I read that Stentor reproduces by fission.
Best,
by dtrinh
Sun Dec 03, 2023 12:21 pm
Forum: Identification help
Topic: A budding Ciliate?
Replies: 2
Views: 773

A budding Ciliate?

Hi everyone,
Could you please help me ID this one? It is budding, I think. I have the video of the whole process, but not knowing which species it is.
Thanks a lot!
Image
Best,
by dtrinh
Mon Jun 05, 2023 6:41 pm
Forum: Microscopes and optics
Topic: Chinese eyepieces equivalent to Leitz Periplan
Replies: 11
Views: 2763

Re: Chinese eyepieces equivalent to Leitz Periplan

Hi everyone, I also thought the chance that Chinese markers produce replica of Leitz eyepieces is low, but you never know. In a similar vein, I have another question: - I often read that some photo eyepieces of low magnifications (2x or less) are extremely rare and sought after (so, very expensive)....
by dtrinh
Sat Jun 03, 2023 8:45 am
Forum: Microscopes and optics
Topic: Chinese eyepieces equivalent to Leitz Periplan
Replies: 11
Views: 2763

Re: Chinese eyepieces equivalent to Leitz Periplan

I doubt it. Nikon did most of their corrections in the objective, starting with the Labophot/Optiphot microscopes. So, "neutral" generic eyepieces work well. Leitz eyepieces are meant to have corrections - and I doubt some Chinese maker has decided to reverse-engineer them. That said, our eyes ofte...
by dtrinh
Fri Jun 02, 2023 7:28 pm
Forum: Microscopes and optics
Topic: Chinese eyepieces equivalent to Leitz Periplan
Replies: 11
Views: 2763

Chinese eyepieces equivalent to Leitz Periplan

Hi everyone,
I know that there are Chinese eyepieces that function similarly to Nikon eyepieces. Is there something similar for Leitz Periplan eyepieces?
Thank you!
Best,
by dtrinh
Wed May 31, 2023 3:14 pm
Forum: For forum members who want to buy and sell equipment
Topic: WTB - Leitz Periplan 5x or 6.3x
Replies: 0
Views: 373

WTB - Leitz Periplan 5x or 6.3x

Hi everyone,
I am looking for an eyepiece: Leitz Periplan 5x or 6.3x.
I am in France.
Thanks!
by dtrinh
Thu May 18, 2023 5:55 pm
Forum: Microscopes and optics
Topic: Olympus FL PL phase contrast system
Replies: 5
Views: 813

Re: Olympus FL PL phase contrast system

In the 1970's transmitted fluorescence was still used quite a bit, less so today. Objectives and condensers needed to be able to transmit the U.V. wavelengths, so special glass, cements and construction techniques were employed in fluorescence optics manufacturing. Such optics are also useful for v...
by dtrinh
Sat May 13, 2023 6:09 pm
Forum: Microscopes and optics
Topic: Olympus FL PL phase contrast system
Replies: 5
Views: 813

Re: Olympus FL PL phase contrast system

These are short barrel objectives from the Vanox and BH era. The 1970's. The parfocal distance is about 36mm or the like. So, to add a 10X objective, it should be of the same type. They are good quality, although (subjective opinion) the contrast is less than those of the BH2 SPlans and Dplans. Che...
by dtrinh
Fri May 12, 2023 1:14 pm
Forum: Microscopes and optics
Topic: Olympus FL PL phase contrast system
Replies: 5
Views: 813

Olympus FL PL phase contrast system

Hi everyone, Does anyone know about this set? I can't find much on the Internet. https://images2.imgbox.com/95/4f/7BYleZ2G_o.jpg https://images2.imgbox.com/1b/f6/Stfp80R5_o.jpg https://images2.imgbox.com/1b/d4/jTGk1sH8_o.jpg If possible I would like to know: - how old are they - are they good in ter...
by dtrinh
Sat Mar 11, 2023 1:43 pm
Forum: Morphology and Behavior
Topic: Paramecia self defense
Replies: 3
Views: 3704

Re: Paramecia self defense

Very nice!
Thanks very much for the protocol. Will try at home.

Cheers,
by dtrinh
Sat Mar 11, 2023 1:39 pm
Forum: Microscopes and optics
Topic: Leica microscope head compatibility
Replies: 5
Views: 888

Leica microscope head compatibility

Hi everyone,
I have a Leica DM750 with a binocular head (infinity). I would like to ask how compatible the heads are, within the infinity system? How do I know if a trinocular head is compatible with the DM750?
This one for example:
https://www.ebay.fr/itm/403987592774

Thank you very much!
by dtrinh
Sun Mar 05, 2023 7:57 pm
Forum: Camera systems and imaging
Topic: The best way to attach a camera to an eyepiece
Replies: 5
Views: 1431

Re: The best way to attach a camera to an eyepiece

Hi everyone, Thank you for your replies! As PeteM said, the only situation when I would need a whole field of view is when I chase some protists. For this microscope, I am using the Sony A5000 + an 2x microscope adapter from Bresser (easy to insert into an eyepiece). I would love to upgrade to a Son...
by dtrinh
Sat Mar 04, 2023 10:33 pm
Forum: Camera systems and imaging
Topic: The best way to attach a camera to an eyepiece
Replies: 5
Views: 1431

The best way to attach a camera to an eyepiece

Hi everyone, From your experience, what is the best way to attach a camera to one of the two eyepieces (no trinocular head) while still be able to navigate easily the sample? I have a Leica DM750 (phase contrast), and a Leica trinocular head on ebay is much more expensive that what I paid for the mi...
by dtrinh
Sat Mar 04, 2023 6:58 pm
Forum: For forum members who want to buy and sell equipment
Topic: Condenser Zeiss achr apl 1.4
Replies: 3
Views: 1017

Re: Condenser Zeiss achr apl 1.4

PeteM wrote:
Thu Mar 02, 2023 10:06 pm
I'd be happy to swap something of similar value for it that you can use, assuming you're in the US (cheap postage). We do a kids' "Micronaut" program and it could upgrade one of our scopes.
Too bad, I live in Europe :)
by dtrinh
Thu Mar 02, 2023 9:40 pm
Forum: For forum members who want to buy and sell equipment
Topic: Condenser Zeiss achr apl 1.4
Replies: 3
Views: 1017

Condenser Zeiss achr apl 1.4

Hello, Anyone interested in this conderser? It has 7 positions in total, 2 of them are filled with phase contrast rings, 1 with iris diaphragm for bright field, 1 for dark field, so 3 are free for you to add other phase contrast rings. This condenser is Achromatic and Aplanatic, meaning it produces ...
by dtrinh
Mon Feb 13, 2023 8:41 pm
Forum: Microscopes and optics
Topic: What should I do with this microscope Axiovert 405M
Replies: 5
Views: 985

Re: What should I do with this microscope Axiovert 405M

The EpiPlan objectives won't be well suited to using with slides and an upright microscope. Instead, they lexpect reflected light and are "no cover" types - designed for use without cover slips. If so, above 20x or so, they'll give poor results with regular microscope slides. It looks like a very c...
by dtrinh
Mon Feb 13, 2023 8:40 pm
Forum: Microscopes and optics
Topic: What should I do with this microscope Axiovert 405M
Replies: 5
Views: 985

Re: What should I do with this microscope Axiovert 405M

Just a feeling. Zeiss AXIO optics are infinity corrected so will only fit in a relatively modern Zeiss microscope, not the 160mm Standard models. They are also quite expensive on the used market. The thread of your objectives is very likely not RMS but M25/M26/M27, I do not know. So they will (poss...
by dtrinh
Fri Feb 10, 2023 9:43 pm
Forum: Microscopes and optics
Topic: What should I do with this microscope Axiovert 405M
Replies: 5
Views: 985

What should I do with this microscope Axiovert 405M

Hi everyone, I just bought a Zeiss Axiovert 405M out of curiousity. It is an inverted reflected metallurgical microscope, and is motorized (which the M stands for; you change the objectives using buttons). It comes with a set of 5x, 10x, 20x, 50x, and 100x EpiPlan NeoFluoar HD DIC in very good condi...
by dtrinh
Tue Jan 03, 2023 10:31 pm
Forum: Miscellaneous
Topic: Microscopy poem by OpenAI
Replies: 8
Views: 1987

Re: Microscopy poem by OpenAI

Finally Friday and I wanted to share this poem with you. I asked the newly release artificial intelligence chatbot "ChatGPT" to write a poem about microscopy and search for the unknown. This is what it came up with: Through the lens of a microscope We explore the world unknown From cells and microb...
by dtrinh
Tue Jan 03, 2023 10:29 pm
Forum: Miscellaneous
Topic: Microbes at the Origin of Trying
Replies: 9
Views: 1854

Re: Microbes at the Origin of Trying

I see them every day now, study them. I have no profession anymore. I lose the world, but I keep them in mind, the very simple and the very pure that the program has put here with me. I chuckle at what they cannot do. Their lives (if we can call it so) are very short, consisting of a few bursts of ...
by dtrinh
Tue Jan 03, 2023 10:28 pm
Forum: Miscellaneous
Topic: Microbes at the Origin of Trying
Replies: 9
Views: 1854

Re: The Origin of Trying

Don, Here is a poem written now by the microbes to us- Hey that light is bright ! I don't mind too much since my eyes aren't as good as yours. Is that why you have to magnify me 100 times my size? I seen your shadow hang over our pond just before the capture. For 73 hundred thousand generations my ...
by dtrinh
Mon Jan 02, 2023 10:11 pm
Forum: Identification help
Topic: What is wrong with this paramecium
Replies: 2
Views: 897

Re: What is wrong with this paramecium

dtrinh, Who said defects happen? Did it move at all ? Probably a dead carcass. Looks like the one part slipped off when it laid there in decay. All that My opinions is all. Hi Dennis, Because the way paramecia produce (the big nucleus divides without replication), genetic errors may occur quite qui...
by dtrinh
Mon Jan 02, 2023 9:48 pm
Forum: Microscopes and optics
Topic: Best way to loosen eyepiece glue
Replies: 8
Views: 1099

Re: Best way to loosen eyepiece glue

Hi again everyone,
So I heated up the lens with a hair dryer, and I was able to disassemble it. Now I have a clean lens producing clear images.
Thank you all!
Best regards,
by dtrinh
Sun Jan 01, 2023 11:30 pm
Forum: Identification help
Topic: What is wrong with this paramecium
Replies: 2
Views: 897

What is wrong with this paramecium

Hi everyone, I suppose this one is a paramecium (elogated microbe), which I have a lot in my still water bottle. But this one seems to be defective, probably because they have been in the same bottle for almost 2 months now, so defects happen. And the donut-shaped on the left is a kind of Arcella? T...
by dtrinh
Sun Jan 01, 2023 11:20 pm
Forum: Identification help
Topic: which Nassula is this
Replies: 2
Views: 897

Re: which Nassula is this

It is not a nassulid, but something in the family Chilodonellidae ( Trithigmostoma, Chilodonella, Pseudochilodonopsis , etc.). We'd need to see more detail to identify this to genus level (ciliature, distribution of contractile vacuoles, etc.). Awsome, thank you very much! The photos and descriptio...
by dtrinh
Sun Jan 01, 2023 10:24 pm
Forum: Microscopes and optics
Topic: Best way to loosen eyepiece glue
Replies: 8
Views: 1099

Re: Best way to loosen eyepiece glue

Thanks everyone for your comments, I will try and report the result.
Bests,
by dtrinh
Sun Jan 01, 2023 10:24 pm
Forum: Microscopes and optics
Topic: Best way to loosen eyepiece glue
Replies: 8
Views: 1099

Re: Best way to loosen eyepiece glue

I don't think these are glued shut. Maybe whoever opened it last overtorqued it. I'm curious, any particular reason you'reusing the 4x? It seems an unfortunate magnification for most modern camera sensors. Hi, thank you for the reply. Yes, it is a second hand, and the first owner tried to open it w...
by dtrinh
Sun Jan 01, 2023 8:31 pm
Forum: Microscopes and optics
Topic: Best way to loosen eyepiece glue
Replies: 8
Views: 1099

Best way to loosen eyepiece glue

Hi everyone,
I have an eyepiece that need to be cleaned, but I can't loosen the screw; the glue seems to be too strong (yet, there are big dust particles inside).
Does anyone know what is the best option here?
Thanks!
Image
by dtrinh
Thu Dec 22, 2022 1:12 pm
Forum: Camera systems and imaging
Topic: where is the image plane of Nikon cf pl 4x
Replies: 1
Views: 1054

where is the image plane of Nikon cf pl 4x

Hi everyone,
I would like to take photos with a Nikon relay lens CF PL 4x. I can find the information about the image plane for the 1x relay lens, but couldn't find it for this 4x lens.
Does anyone happen to know it? Or how can i identify it?
Thank you!
by dtrinh
Mon Dec 19, 2022 7:55 pm
Forum: Microscopes and optics
Topic: Nikon 50X objective with iris
Replies: 15
Views: 7543

Re: Nikon 50X objective with iris

Thank you all for very informative inputs. I have ordered one, mostly to have the dark field capability.
Best regards.