Search found 3028 matches
- Mon May 13, 2024 4:43 am
- Forum: Microscopes and optics
- Topic: N A values for various Stereoscopes
- Replies: 1
- Views: 54
Re: N A values for various Stereoscopes
My understanding (various sources - some of them OEM manuals) for 1X stereo objectives: Original Olympus SZH Plan 1x: .087 na Olympus DF Plan: .084 na Nikon ED Plan: .090 na Olympus DF Plapo: .100 na Nikon Plan 1x: .105 na (I adapted one of these to an Olympus SZH10, where it performs well) The earl...
- Sat May 11, 2024 10:23 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: Liquidation auctions, etc.
- Replies: 1
- Views: 111
Re: Liquidation auctions, etc.
While there are several sites that list auctions (government, public schools, private businesses, etc.), your ability to effectively participate is likely to be a regional thing. You want to be there to inspect the equipment, carefully pack it up, arrange for shipment, etc. Thus, Craigslist might be...
- Sat May 11, 2024 2:33 am
- Forum: Pictures and Videos
- Topic: A selection of marine diatoms from the Gulf of Thailand
- Replies: 5
- Views: 165
Re: A selection of marine diatoms from the Gulf of Thailand
Beautifully captured, cleverly edited. Thanks for sharing them.
- Sun May 05, 2024 11:10 pm
- Forum: Introduce yourself
- Topic: Your earliest memories and experiences with microscopes?
- Replies: 4
- Views: 192
Re: Your earliest memories and experiences with microscopes?
Although its exact location on a chromosome remains elusive, I seem to have been born with the tool gene - playing with them from the earliest age. My Mom got a teaching degree before WWII and an engineering degree during it. My parents started a family after dad returned from WWII, living on campus...
- Sat May 04, 2024 3:30 am
- Forum: Microscopes and optics
- Topic: IDENTIFY SLIDE FILTER NIKON?
- Replies: 6
- Views: 197
Re: IDENTIFY SLIDE FILTER NIKON?
You might get a better guess if you can measure the dovetail and match it up with a scope. My guess is that the oblong windows (probably wave plate, clear, and polarizing) are meant to accommodate stereo paths. It's possible it fits on the end of a Greenough scope or under the head in a CMO scope. T...
- Fri May 03, 2024 4:53 am
- Forum: Microscopes and optics
- Topic: IDENTIFY SLIDE FILTER NIKON?
- Replies: 6
- Views: 197
Re: IDENTIFY SLIDE FILTER NIKON?
Stjepo, looks like it's intended for a stereo microscope - likely including both a pol filter and a wave plate.
- Fri May 03, 2024 4:50 am
- Forum: Microscopes and optics
- Topic: Older viewing heads on newer bodies
- Replies: 3
- Views: 145
Re: Older viewing heads on newer bodies
You don't want to mix them up. The CH, BH, CH2, and BH2 have 160mm finite objectives and want finite heads. The CX and BX have infinite objectives and want infinite heads with the proper tube lens inside.
- Fri May 03, 2024 4:44 am
- Forum: Microscopes and optics
- Topic: Siedentopf adjustment of Binocular Head
- Replies: 3
- Views: 138
Re: Siedentopf adjustment of Binocular Head
A guess is that the center cap (with the interpupillary distance markings) unscrews or pops off - revealing a nut or other adjustment to draw the binocular tubes closer together and tighter. Failing that, a complete re-lube with a damping grease might be an option.
- Thu May 02, 2024 2:24 pm
- Forum: Microscopes and optics
- Topic: How sensitive are objectives to slide or stage crashes?
- Replies: 8
- Views: 288
Re: How sensitive are objectives to slide or stage crashes?
A way to eliminate most of the hassle with a cell phone as a microscope camera is to buy or use a spare phone. For example, you can buy a new-old-stock iPhone 6 for around $60 on eBay, a holder for about $20, a remote release for about $15, and a third properly corrected Leica eyepiece for perhaps $...
- Wed May 01, 2024 3:52 pm
- Forum: Microscopy accessories
- Topic: Unidentified thread-adapter
- Replies: 2
- Views: 142
Re: Unidentified thread-adapter
No idea what it fits. However, the 520544 number could well be a Leitz/early Leica identification. Later ones, in microscope accessories, will have a "10" in front (e.g. 10520544).
The M42 end would be useful, even if you ended up adapting something else to the small end.
The M42 end would be useful, even if you ended up adapting something else to the small end.
- Tue Apr 30, 2024 8:02 pm
- Forum: Microscopes and optics
- Topic: Reichert Polyvar
- Replies: 161
- Views: 1840588
Re: Reichert Polyvar
Rorschach - thank you in advance for scanning and posting the Polyvar materials. I know that several of us find these scopes a mystery.
- Tue Apr 30, 2024 5:07 pm
- Forum: Pictures and Videos
- Topic: 3 Testate Amoebae. The 2nd one explodes, apparently from a growing air bubble
- Replies: 4
- Views: 187
- Tue Apr 30, 2024 2:59 pm
- Forum: Microscopes and optics
- Topic: How sensitive are objectives to slide or stage crashes?
- Replies: 8
- Views: 288
Re: How sensitive are objectives to slide or stage crashes?
Good 100x lenses are often designed with some protection for the central portion of the glass. With oil immersion, a 100x may yield an OK image with a slight scratch. Yours, however, was repeatedly entered into a demolition derby. In addition to scratches, there's a good chance the oil seal has been...
- Sun Apr 28, 2024 11:48 pm
- Forum: Camera systems and imaging
- Topic: Is this genius or madness ?
- Replies: 25
- Views: 4353
Re: Is this genius or madness ?
It looks like Leica has gone with the idea :o https://leica-camera.com/en-GB/World-of-Leica/Leitz-Phone-2 MichaelG. Leica's technical data says Sharp makes the phone -- and this appears to be the Sharp version: https://www.gadgets360.com/sharp-aquos-r8-pro-price-in-india-117463 Personally, I like t...
- Sat Apr 27, 2024 6:26 pm
- Forum: Microscopes and optics
- Topic: Considering making an inf. frankenscope, would like epi options, have some objectives, thoughts?
- Replies: 10
- Views: 774
Re: Considering making an inf. frankenscope, would like epi options, have some objectives, thoughts?
A relatively easy and affordable way to get a tube lens for an Olympus BX would be to scavenge one from a broken BX (U-BI30) binocular head. The eye tubes fairly commonly break off during a spill, leaving a tube lens and dovetail behind. With patience and eBay luck, you might find the parts around $...
- Wed Apr 24, 2024 7:29 pm
- Forum: Microscopes and optics
- Topic: BX system and field number (FN) for different configurations
- Replies: 7
- Views: 456
Re: BX system and field number (FN) for different configurations
You'll typically lose a bit of field after stacking several intermediate accessories. Leica provides guidance for their various heads and the number of intermediate pieces. I don't recall seeing the equivalent from Olympus, though it's likely out there somewhere. I'd think you could place one elemen...
- Wed Apr 24, 2024 7:15 am
- Forum: Pictures and Videos
- Topic: Maybe Something New Coming
- Replies: 5
- Views: 369
Re: Maybe Something New Coming
Re: the black and white. Don is our resident existentialist microbe philosopher. He's also creating a new film genre . . .
. . . bio-film noir!
. . . bio-film noir!
- Wed Apr 24, 2024 4:42 am
- Forum: Microscopes and optics
- Topic: Cal Zeiss Jena Ergaval
- Replies: 4
- Views: 334
Re: Cal Zeiss Jena Ergaval
Gary, This will give you an idea of what sort of halogen lamp (or sometimes a mirror) should be included for the illuminator: https://www.geocities.ws/dushang2000/Microscopy/Service%20and%20User%20Manuals/Zeiss%20Ergaval%2030-G047C-2.pdf Personally, I'd look for a different microscope unless you're ...
- Tue Apr 23, 2024 11:13 pm
- Forum: Microscopes and optics
- Topic: Cal Zeiss Jena Ergaval
- Replies: 4
- Views: 334
Re: Cal Zeiss Jena Ergaval
I've had a Laboval, Gary, and thought it was OK, but with middling mechanical construction, illumination, somewhat constricted field of view, and OK but not exceptional optics; not particularly better than $400 or so AmScope. I don't know if the Ergoval will be a step up. If you already have this, a...
- Tue Apr 23, 2024 7:34 pm
- Forum: Pictures and Videos
- Topic: Euglena sanguinea bloom
- Replies: 1
- Views: 182
Re: Euglena sanguinea bloom
All excellent -- I particularly enjoyed your darkfield images.
- Tue Apr 23, 2024 3:23 am
- Forum: Pictures and Videos
- Topic: Broken
- Replies: 6
- Views: 373
Re: Broken
That's a gorgeous image, Saul. Thanks for creating and sharing it.
- Fri Apr 19, 2024 11:29 pm
- Forum: Microscopes and optics
- Topic: Considering making an inf. frankenscope, would like epi options, have some objectives, thoughts?
- Replies: 10
- Views: 774
Re: Considering making an inf. frankenscope, would like epi options, have some objectives, thoughts?
It sounds like you want to have both an episcopic and brightfield scope at a bargain price. One way to go: 1) Get a complete but affordable epi microscope stand, intermediate illuminator, nosepiece, and BD objectives. Either an Olympus BHM, maybe a BHT or BHS plus an epi illuminator, or a Nikon Opti...
- Thu Apr 18, 2024 9:35 pm
- Forum: Microscopes and optics
- Topic: Partially blocked Leica objective
- Replies: 29
- Views: 1218
Re: Partially blocked Leica objective
Wayne - that "contrast automatic" feature is new to me. Thanks - it should be much easier to use than fiddling with perceived resolution and refocusing. My question - do you know if Nikon and Olympus infinite objectives behave in much the same way?
- Thu Apr 18, 2024 12:11 am
- Forum: Microscopes and optics
- Topic: Partially blocked Leica objective
- Replies: 29
- Views: 1218
Re: Partially blocked Leica objective
+3 It's a Modulation Contrast objective, especially useful to add contrast to live specimens on an inverted microscope. Someone will likely be willing to swap it for one without the added bits of polarizing film. You might also hope to acquire a matching condenser and a couple more objectives - at a...
- Tue Apr 16, 2024 12:26 am
- Forum: Illumination Techniques
- Topic: My first impressions of DIC on the BX system and BX prism compatibility
- Replies: 3
- Views: 399
Re: My first impressions of DIC on the BX system and BX prism compatibility
These days, admission to an art museum is $20. Owning great art can be orders of magnitude more expensive. Your BX is like having lifetime rights to a spectacular collection—actually collected, curated, and often at least partly created or arranged by you.
"Wow" is an apt description.
"Wow" is an apt description.
- Mon Apr 15, 2024 6:40 pm
- Forum: Microscopes and optics
- Topic: how scared should I be of mercury lamps
- Replies: 14
- Views: 790
Re: how scared should I be of mercury lamps
There are two main risks: exposure to UV light in use and shattering of the bulb . . . with a release of mercury and mercury vapor. Unless the power supply shows a clear indication of the life left in the bulb or other reliable assurances it is near new, you might assume it's past its useful life an...
- Mon Apr 15, 2024 2:32 am
- Forum: Beginner's corner
- Topic: What happened to the Leica DMLB?
- Replies: 11
- Views: 1892
- Sun Apr 14, 2024 7:34 pm
- Forum: Illumination Techniques
- Topic: Prepared slide set for demonstrating contrast techniques?
- Replies: 8
- Views: 677
Re: Prepared slide set for demonstrating contrast techniques?
You may want to show how the thickness of specimen preparation affects contrast methods as well. Stains also affect the choices. This will be easier and more beneficial with prepared specimens - so if most everything you're doing is unstained live protists and plankton it is perhaps not as relevant....
- Thu Apr 04, 2024 6:03 pm
- Forum: Microscopes and optics
- Topic: Leica DMRB- which lenses and prisms for DIC
- Replies: 12
- Views: 1020
Re: Leica DMRB- which lenses and prisms for DIC
The Accu-Scope objectives on this are semi-apo. In other words, more like plan fluorite than plan apo. The ones I've had did not perform as well as their Olympus, Nikon, and Leica counterparts. They were better than plan achromats but not as good as the better plan fluorites from major makers. They'...
- Thu Apr 04, 2024 4:15 am
- Forum: Microscopes and optics
- Topic: Leica DMRB- which lenses and prisms for DIC
- Replies: 12
- Views: 1020
Re: Leica DMRB- which lenses and prisms for DIC
As I understand it the difference between B and B1 or D and D1 (etc.) prisms is in the shear angles. The letter alone (A, B, C, D . . .) is a balance between 3D effect and ultimate resolution. The B1 (etc.) designation (as I understand it) has a bit less shear, a bit less contrast and 3D effect, but...