Search found 2989 matches
- Tue Feb 20, 2024 4:40 pm
- Forum: Microscopes and optics
- Topic: DIC on Nikon Eclipse Ci-L
- Replies: 4
- Views: 431
Re: DIC on Nikon Eclipse Ci-L
As far as I can tell, there are three issues in using one of Nikon's less expensive Eclipse microscopes with transmitted DIC: 1) You need to be able to fit a DIC interchangeable nosepiece. It doesn't look like the Ci-L has either the interchangeable nosepiece fitting, nor the clearance, and probably...
- Mon Feb 19, 2024 6:05 pm
- Forum: Microscopy accessories
- Topic: Wild Heerbrugg M5 power supply
- Replies: 14
- Views: 847
Re: Wild Heerbrugg M5 power supply
You probably know this, but the area of exposed autotransformer coils and the (usually) carbon brush that sweeps through it are often oxidized in old units. That might also require attention.
- Thu Feb 15, 2024 12:20 am
- Forum: Microscopes and optics
- Topic: NIKON PlanApo 100X/140 oil that is a PlanApo 60X/140 oil
- Replies: 121
- Views: 8323
Re: NIKON PlanApo 100X/140 oil that is a PlanApo 60X/140 oil
Sjtepo, it looks like the surgery was a success, bringing back Mr. Apo from the dead.
- Wed Feb 14, 2024 4:54 pm
- Forum: Microscopes and optics
- Topic: NIKON PlanApo 100X/140 oil that is a PlanApo 60X/140 oil
- Replies: 121
- Views: 8323
- Wed Feb 14, 2024 7:21 am
- Forum: Microscopes and optics
- Topic: Wild M8 vs Wild MZ3
- Replies: 16
- Views: 927
Re: Wild M8 vs Wild MZ3
1x is standard and all that many ever need. The objective may be an achromat, a better and desirable plan achromat, or possibly even better plan apo. There's usually a tradeoff between working distance and resolution. A Plan Achromat might be the sweet spot in terms of excellent performance at reaso...
- Tue Feb 13, 2024 6:46 pm
- Forum: Microscopes and optics
- Topic: Wild M8 vs Wild MZ3
- Replies: 16
- Views: 927
Re: Wild M8 vs Wild MZ3
Erik, The M8 has a wider zoom range and is generally considered more valuable. However, both are excellent stereo microscopes. Your choice probably comes down to the quality of objective that is present, the condition, and perhaps extra features such as a transilluminated stage. Given that a presume...
- Sun Feb 11, 2024 8:37 am
- Forum: Beginner's corner
- Topic: Micronauts…could someone discuss this?
- Replies: 3
- Views: 512
Re: Micronauts…could someone discuss this?
It's one of my retirement projects. Tom Jones, another member here, does a program along these lines as well. Probably others. Pretty sure I posted some pictures years ago from one of our events - "Speed dating with microscopes." Held at our local Children's Museum of Discovery. I got about 25 frien...
- Sun Feb 11, 2024 1:37 am
- Forum: Microscopes and optics
- Topic: Fisher Scientific Micromaster Microscopes
- Replies: 9
- Views: 842
Re: Fisher Scientific Micromaster Microscopes
I thought the Japanese-made scopes were a little bit better. Not sure when manufacturing switched to China - probably over a decade ago? It could also be that some later versions added a field aperture.
- Sun Feb 11, 2024 1:35 am
- Forum: Beginner's corner
- Topic: Micronauts…could someone discuss this?
- Replies: 3
- Views: 512
Re: Micronauts…could someone discuss this?
Not much to discuss. It's a local kids' science program I founded a few years ago.
- Sat Feb 10, 2024 9:36 pm
- Forum: Microscopes and optics
- Topic: Fisher Scientific Micromaster Microscopes
- Replies: 9
- Views: 842
Re: Fisher Scientific Micromaster Microscopes
I've fixed up a handful of them for "Micronauts" -- mostly the earlier Japanese-made models rather than the later Chinese ones. Decent scopes, somewhat like an Olympus BH2 in size and aspirations, but falling short in a few ways. The mechanical design is fiddly, with things like stages and condenser...
- Sat Feb 10, 2024 4:38 am
- Forum: Illumination Techniques
- Topic: My problem with DIC PZO
- Replies: 14
- Views: 1372
Re: My problem with DIC PZO
Ideally, you end up with the upper prisms at the back focal plane of whatever objectives you find. In addition to Stephen's point about objective compatibility, you may want to be mindful that your adaptation of the PZO upper DIC prisms ends up at the same height above the objective as on a PZO syst...
- Fri Feb 09, 2024 9:58 pm
- Forum: My microscope
- Topic: Does Anybody Recognize this Inverted 'Scope?
- Replies: 33
- Views: 3430
Re: Does Anybody Recognize this Inverted 'Scope?
Is there a chart that lists various manufacture’s ring sizes? If so please list the link to it. Thanks Not that I'm aware of. There's an eBay seller making laser-cut rings out of Delrin to fit various phase setups. He lists the dimensions of his sets. In my limited experience, they are often right ...
- Fri Feb 09, 2024 3:23 am
- Forum: My microscope
- Topic: Does Anybody Recognize this Inverted 'Scope?
- Replies: 33
- Views: 3430
Re: Does Anybody Recognize this Inverted 'Scope?
Gerry, It looks pretty straightforward and of decent construction. I'm not sure a Chinglish manual will add much to your understanding. The exception to that would be if the objectives are phase contrast and the condenser annulli are missing -- and you hope to find something that matches. If so, you...
- Wed Feb 07, 2024 9:03 pm
- Forum: Pictures and Videos
- Topic: Nature's Poor Quality Control Standard
- Replies: 3
- Views: 317
Re: Nature's Poor Quality Control Standard
Sloppy workmanship? Perhaps yes and no, Don. One can look at US partisanship and poor decision-making to decide that we humans may not pass even One Sigma quality standards, much less the Six Sigma manufacturing often strives for. However, as a matter of structural design, nature has evolved clever ...
- Tue Feb 06, 2024 9:52 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: WTB: Olympus BH2-AN Analyser for DIC
- Replies: 21
- Views: 1778
Re: WTB: Olympus BH2-AN Analyser for DIC
A few added points: 1) As noted above, the "long barrel" version of the Olympus Vanox upper prism will work on BH2. If you have the upper prism slider but not the intermediate piece it slides into, I believe a polarizing intermediate can work. 2) If you have the long barrel Vanox version of the DIC ...
- Tue Feb 06, 2024 2:30 am
- Forum: Pictures and Videos
- Topic: Crystallization in polarized light
- Replies: 5
- Views: 424
Re: Crystallization in polarized light
Beautifully done (including some of your other videos as well) - and nicely paired with music.
- Mon Feb 05, 2024 2:08 am
- Forum: Microscopy accessories
- Topic: Olympus BH2 Magnification Changer
- Replies: 4
- Views: 647
Re: Olympus BH2 Magnification Changer
There's a sort of carousel inside, typically with achromat doublet lenses for the magnification and often a Bertrand lens. Not sure Olympus made one with something below a 1x magnification. These made great sense in an era where film cameras ruled, and where users want to get the best possible image...
- Sat Feb 03, 2024 3:58 am
- Forum: Illumination Techniques
- Topic: Has anyone ever used LWD condenser?
- Replies: 8
- Views: 944
Re: Has anyone ever used LWD condenser?
. . . About phase contrast, I have a question: given the light only goes through a small hold in the phase contrast ring, does it mean the actual phase contrast objective N.A. is lower? My phase contrast objective is 40x/0.75, I see Olympus ph objective is also 40/0.75. With LWD condenser NA 0.65, ...
- Fri Feb 02, 2024 7:59 pm
- Forum: Illumination Techniques
- Topic: Has anyone ever used LWD condenser?
- Replies: 8
- Views: 944
Re: Has anyone ever used LWD condenser?
As you and Phill suggest, on an inverted microscope you'd want more working distance between the top (bottom side when inverted) of the condenser and the stage - in order to fit Petri dishes and the like. For your Motic version -- lower numerical aperture condensers on an upright microscope often fi...
- Fri Feb 02, 2024 4:02 am
- Forum: Microscopes and optics
- Topic: Measuring collimation error on Olympus CH2
- Replies: 2
- Views: 325
Re: Measuring collimation error on Olympus CH2
For practical purposes, binocular collimation of heads is in the eyes of the beholder. If you can view specimens for long periods of time without eyestrain, I'd say you're OK. Close is often good enough, though some individuals seem more sensitive than others. As far as methods, there are fancy opti...
- Fri Feb 02, 2024 1:14 am
- Forum: Microscopes and optics
- Topic: Olympus CK2 binocular schematic needed
- Replies: 6
- Views: 463
Re: Olympus CK2 binocular schematic needed
Have you tried opening up the interpupillary adjustment all the way - to reveal screws from the back side securing the covers? That, along with removing some other small screws from the front and the middle cover, works for some Olympus heads. The sliders are typically secured by gibs with screws ac...
- Fri Feb 02, 2024 1:00 am
- Forum: Microscopes and optics
- Topic: Olympus CK2 binocular schematic needed
- Replies: 6
- Views: 463
Re: Olympus CK2 binocular schematic needed
Assuming there isn't a detached prism inside and the collimation errors are minor, you can often adjust the eyetubes to get the same view in both eyes. The general procedure, which I think (if memory serves) applies to the CH, BH, and CK2 heads, is to remove the black plastic cosmetic covers to reve...
- Thu Feb 01, 2024 10:14 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: WTB: Olympus BH2-AN Analyser for DIC
- Replies: 21
- Views: 1778
Re: WTB: Olympus BH2-AN Analyser for DIC
Andrei, I believe the BH2-AN is just for the analyzer (a polarizing filter in a slider) and that the BH2-NA is the part you want. In any case, be sure the slider has both a Nomarski prism and an analyzer. If you can find a clone from a Chinese source, that may be your best option. DeBult - we're bot...
- Thu Feb 01, 2024 4:55 am
- Forum: Beginner's corner
- Topic: Importing Items From Europe to US
- Replies: 12
- Views: 1108
Re: Importing Items From Europe to US
I can't speak for all countries, but my experience with small microscope accessories bought on eBay and shipped from Australia, Japan, China, the UK, Germany etc. typically just required paying my prevailing sales tax rate. I've never been asked for a Social Security number. I also wouldn't buy from...
- Thu Feb 01, 2024 12:11 am
- Forum: Microscopes and optics
- Topic: Nikon Plan Apo 20x
- Replies: 2
- Views: 399
Re: Nikon Plan Apo 20x
Yours should have a spring action. It can be stuck from being dropped and the shell slightly deformed, corrosion, immersion oil dried, or attempts to lube it followed by oxidized oil. I believe there are past posts on how to unstick it. The good news, for now, is that yours appears to be stuck in th...
- Tue Jan 30, 2024 1:56 am
- Forum: Beginner's corner
- Topic: What is "fine focus range"
- Replies: 4
- Views: 475
Re: What is "fine focus range"
FWIW, you could think of focusing range from the parfocal tip of the objective down, as well, since the stage is most commonly the part that moves up and down in today's compound scopes. Many scopes have an adjustable stage stop to avoid crashing a slide into the objective when it's being raised - a...
- Mon Jan 29, 2024 10:54 pm
- Forum: Beginner's corner
- Topic: What is "fine focus range"
- Replies: 4
- Views: 475
Re: What is "fine focus range"
I'm not sure I'd trust today's low-end makers to use the term "fine focus range" in the way it was once understood. Those ranges (25mm or 30mm) sound like coarse focusing ranges. It may also be the fine focusing range, depending on the mechanism. That is, how much room there is from focusing from th...
- Mon Jan 29, 2024 5:34 pm
- Forum: Microscopes and optics
- Topic: Which 40x and 4x objectives for Nikon Labophot?
- Replies: 16
- Views: 1198
Re: Which 40x and 4x objectives for Nikon Labophot?
My guesstimate is that the three likeliest problems are: 1) Inability to get both good Kohler illumination and a wide enough image circle. One would expect color fringing at the very edges of the illuminated field, but with that mostly outside the field of view with a proper illumination system, the...
- Mon Jan 29, 2024 2:29 am
- Forum: Microscopes and optics
- Topic: Which 40x and 4x objectives for Nikon Labophot?
- Replies: 16
- Views: 1198
Re: Which 40x and 4x objectives for Nikon Labophot?
Was it a DIY or commercial LED retrofit? I've had good luck with Saul's units and also the RetroDiode.
- Sun Jan 28, 2024 4:31 pm
- Forum: Microscopes and optics
- Topic: Which 40x and 4x objectives for Nikon Labophot?
- Replies: 16
- Views: 1198
Re: Which 40x and 4x objectives for Nikon Labophot?
Two of your problems may have more to do with your condenser than the objectives. 1) The 4x objectives, and particularly the 4x CFN .13 n.a. should easily fill a 20mm FN IF you have a suitable condenser - such as the Nikon flip top unit, with the top down. You can also try dropping your condenser if...