Search found 3020 matches
- Thu May 02, 2024 2:24 pm
- Forum: Microscopes and optics
- Topic: How sensitive are objectives to slide or stage crashes?
- Replies: 8
- Views: 190
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: 73
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: 154
- Views: 1839492
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: 124
- Tue Apr 30, 2024 2:59 pm
- Forum: Microscopes and optics
- Topic: How sensitive are objectives to slide or stage crashes?
- Replies: 8
- Views: 190
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: 4212
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: 7
- Views: 444
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: 283
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: 225
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: 197
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: 197
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: 90
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: 247
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: 7
- Views: 444
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: 958
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: 958
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: 330
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: 674
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: 1801
- Sun Apr 14, 2024 7:34 pm
- Forum: Illumination Techniques
- Topic: Prepared slide set for demonstrating contrast techniques?
- Replies: 8
- Views: 529
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: 966
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: 966
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...
- Thu Apr 04, 2024 4:04 am
- Forum: Microscopes and optics
- Topic: Cleaning Fungus from Microscope Optics
- Replies: 5
- Views: 876
Re: Cleaning Fungus from Microscope Optics
If you search this site, you'll find some answers. Search is typically easiest if you Google something like "cleaning fungus from lenses site:microbehunter.com"
- Thu Apr 04, 2024 1:08 am
- Forum: Microscopes and optics
- Topic: Leica DMRB- which lenses and prisms for DIC
- Replies: 12
- Views: 966
Re: Leica DMRB- which lenses and prisms for DIC
The first eBay listing for the 10 PL Fluotar looks good. I believe it wants a K2. They do show up now and then. I suspect, but don't know, that the 10x Plan Apo wants a K2 as well. Note that you're not getting higher resolution than the same .30 N.A. Plan Fluor. You get slightly better correction of...
- Wed Apr 03, 2024 9:57 pm
- Forum: Microscopes and optics
- Topic: Leica DMRB- which lenses and prisms for DIC
- Replies: 12
- Views: 966
Re: Leica DMRB- which lenses and prisms for DIC
The older "Delta" optic type DMRB has black lettering - like yours. Unmarked Leica objectives and those with an HCX will match the tube lens a bit better. You do want objectives that specify a letter (A,B,C,D...) on the objective or very early on a * to be compatible with DIC. If you find an "HC" ob...
- Tue Apr 02, 2024 10:25 pm
- Forum: Microscopes and optics
- Topic: Averaging condenser and objective numerical aperture when predicting resolution
- Replies: 49
- Views: 5128
Re: Averaging condenser and objective numerical aperture when predicting resolution
The long-standing relationship of numerical aperture relationship to resolution is basically a geometric one - assuming every photon of light at some wavelength/energy is fully constrained within some cone of light. By that simple math, and using ray tracing, I think we all agree that (whether it is...
- Mon Apr 01, 2024 1:52 am
- Forum: Microscopes and optics
- Topic: Averaging condenser and objective numerical aperture when predicting resolution
- Replies: 49
- Views: 5128
Re: Averaging condenser and objective numerical aperture when predicting resolution
Thanks for taking the time to dig up those sources, Hans.
We both likely suspect the answer gets even more interesting if the subject isn't a grating, but something like a stained tissue.
We both likely suspect the answer gets even more interesting if the subject isn't a grating, but something like a stained tissue.
- Sun Mar 31, 2024 7:11 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: Searching For: Extention between intermediate tube and the observation tube for an IMT-2 Olympus Inverted Microscope
- Replies: 4
- Views: 853
Re: Searching For: Extention between intermediate tube and the observation tube for an IMT-2 Olympus Inverted Microscope
Frank - here's a guess about your options (assuming I understand correctly that you want to raise the height of your eyepieces). The picture you show is a bit confusing to me - it looks like it is sitting above some sort of camera (?) adapter (that numbered dial on its upper left side) rather than d...
- Sat Mar 30, 2024 7:17 am
- Forum: Microscopes and optics
- Topic: Do I need another objective?
- Replies: 61
- Views: 7621
Re: Do I need another objective?
. . . I've heard (from Stephen, on this site) that the PF ELWD 60x is about as good as it gets for this objective and expect to have one fairly soon. . . . Going back a bit in this thread -- I can confirm that the PF ELWD 60C prism works very well with Nikon's dry 0.85na Plan Fluor objective - far ...
- Fri Mar 29, 2024 9:36 pm
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2841
Re: Olympus IMT-2 mystery
Michael, the rating plate on your microscope suggests the power supply can support 100 watt lamps (100+ volts x 2A = 200 or so watts input). I've only seen versions of the IMT-2 with that 50-watt lamp housing. But, odds are, you're OK.