Search found 4283 matches
- Thu Jan 11, 2024 3:20 pm
- Forum: Beginner's corner
- Topic: Looking for camera for Swift SW380B
- Replies: 28
- Views: 8727
Re: Looking for camera for Swift SW380B
Oh, to clarify: this is the typical information posted by sellers about their microscope cameras, which is where I could use some guidance picking out the 3-4 important details to compare among several different camera offerings. HAYEAR USB3.0 Digital Microscope Camera 8 Mega Pixels USB Live Video ...
- Wed Jan 10, 2024 9:59 am
- Forum: Microscopes and optics
- Topic: Correction Collar : Leitz [surprise]
- Replies: 11
- Views: 12888
Re: Correction Collar : Leitz [surprise]
The same footnote #2 applies to the two dry planapo objectives, 40X0.95 and 63X0.95, on the previous page of that same Leitz catalog (p. 19, top table).
- Sat Jan 06, 2024 4:58 pm
- Forum: Camera systems and imaging
- Topic: Camera sensor size to see bigger F.O.V.
- Replies: 10
- Views: 10834
Re: Camera sensor size to see bigger F.O.V.
What is the FN of the microscope ? a camera image width of 0.74mm from a 40X objective seems to me very large. If the FN for example is 26, the image diameter through the eyepieces would be 0.65mm. Or is the 0.74mm obtained from a 10X objective ?
- Thu Jan 04, 2024 10:25 pm
- Forum: Microscopes and optics
- Topic: No power to light sources on Leica DMRE
- Replies: 9
- Views: 9840
Re: No power to light sources on Leica DMRE
How about both bulbs are burnt out, normal end of life ?
- Wed Jan 03, 2024 7:20 pm
- Forum: Home-made microscope adaptations
- Topic: Dichromatic Illumination?
- Replies: 61
- Views: 117980
Re: Dichromatic Illumination?
Copied from the site of a firm named Synopsys. It shows the light losses when the tip is tapered to produce a narrower end.
They state that losses are substantial.
They state that losses are substantial.
- Wed Jan 03, 2024 8:01 am
- Forum: Home-made microscope adaptations
- Topic: Dichromatic Illumination?
- Replies: 61
- Views: 117980
Re: Dichromatic Illumination?
A light guide does not "concentrate" light or "funnel" it or focus it, regardless of the geometry of the tip (square cut/frustum). As mentioned, one can axially drill a 5mm LED, insert a 1mm-diameter (say) optical fiber into the bore, attach it with epoxy, and cover the LED by means of a PVC shrink-...
- Tue Jan 02, 2024 9:33 pm
- Forum: Home-made microscope adaptations
- Topic: Dichromatic Illumination?
- Replies: 61
- Views: 117980
Re: Dichromatic Illumination?
… I think, still, that the OPs project will still offer some interesting results … Most definitely … I’m looking forward to seeing them MichaelG. Gee fellows, I don't know if there will be any interesting results. I am a complete beginner in microscopy and a lot of the stuff you guys talk about go ...
- Sun Dec 31, 2023 8:29 pm
- Forum: Pictures and Videos
- Topic: Rocking radiolarians at the New Year's Eve party
- Replies: 3
- Views: 2725
- Fri Dec 29, 2023 9:50 am
- Forum: About the website, the magazine and this forum
- Topic: New trouble uploading images...
- Replies: 19
- Views: 16684
Re: New trouble uploading images...
Same issue here. Cannot upload photos.
- Wed Dec 27, 2023 7:10 pm
- Forum: Miscellaneous
- Topic: Snow.
- Replies: 5
- Views: 4908
Re: Snow.
Thanks for pointing out this fascinating subject!
- Wed Dec 27, 2023 11:47 am
- Forum: Home-made microscope adaptations
- Topic: Dichromatic Illumination?
- Replies: 61
- Views: 117980
Re: Dichromatic Illumination?
It might help to know which type of microscope illumination is wished. Both brightfield and fluorescence, at least, benefit from a single die LED source, rather than a multi-LED arrangement. Besides, I wonder about the wavelength combination... For visual observation, green or blue or amber light ar...
- Tue Dec 26, 2023 3:51 pm
- Forum: Beginner's corner
- Topic: Olympus NIC/Phase Contrast condenser repair question
- Replies: 8
- Views: 4836
Re: Olympus NIC/Phase Contrast condenser repair question
I have an old condenser top lens, Olympus achromat aplanat 1.4, in fairly good condition I think. Looks similar to yours and perhaps will fit your condenser. Thread diameter 35mm. Top glass diameter 16.4mm. Glass looks clean, except for two tiny chirps (diameter, say <0.5mm) on the top glass. I beli...
- Wed Dec 20, 2023 10:33 pm
- Forum: Beginner's corner
- Topic: Tools for dissecting really tiny spiders and insects
- Replies: 6
- Views: 4159
Re: Tools for dissecting really tiny spiders and insects
You might try very fine syringe hypodermic needles. They go by gauge number, #33 is the finest I ever met, but #27 (and maybe grades #28-#30 too) are easy to find (on eBay, etc). The tip of a hypodermic needle is actually a tiny blade. Another useful very thin utensil, though not a blade, is the nee...
- Mon Dec 11, 2023 4:02 pm
- Forum: Microscopes and optics
- Topic: optiphot-1: fine focus knob trouble
- Replies: 9
- Views: 5078
Re: optiphot-1: fine focus knob trouble
There is a manual named:
Nikon OPTIPHOT BODY LABOPHOT REPAIR MANUAL
for the beginner and experienced technician alike (seriously!)
It has been downloadable from the University of Arizona site.
It provides exploded views and instructions for disassembly of the focusing gear.
Nikon OPTIPHOT BODY LABOPHOT REPAIR MANUAL
for the beginner and experienced technician alike (seriously!)
It has been downloadable from the University of Arizona site.
It provides exploded views and instructions for disassembly of the focusing gear.
- Wed Dec 06, 2023 1:17 pm
- Forum: Microscopes and optics
- Topic: Let’s talk about Delamination
- Replies: 30
- Views: 55213
- Sat Dec 02, 2023 8:48 pm
- Forum: Microscopy accessories
- Topic: Cleaning excitation filtres
- Replies: 13
- Views: 11555
Re: Cleaning excitation filtres
I can't get any light to come through.... I noticed the back of the cube is labeled "Omega XF06." This describes the following setup: Exciter: XF1005 (365WB50) Dichroic: XF2001 (400DCLP) Emitter: XF3002 (450DF65) as described here: http://www.glenspectra.co.uk/glen/filters/pdfs/XF06.pdf But the Oly...
- Sat Dec 02, 2023 7:01 pm
- Forum: Microscopy accessories
- Topic: Cleaning excitation filtres
- Replies: 13
- Views: 11555
Re: Cleaning excitation filtres
Perhaps I am utterly stupid but could it be that there are actually two glass filters, in two separate metal holders in series ? One holder contains nice violet-reflecting glass, probably the BP545 filter. It passes green and reflects violet. The other holder contains what looks like a green-reflec...
- Sat Dec 02, 2023 4:10 pm
- Forum: Microscopy accessories
- Topic: Cleaning excitation filtres
- Replies: 13
- Views: 11555
Re: Cleaning excitation filtres
Perhaps I am utterly stupid but could it be that there are actually two glass filters, in two separate metal holders in series ? One holder contains nice violet-reflecting glass, probably the BP545 filter. It passes green and reflects violet. The other holder contains what looks like a green-reflect...
- Sat Dec 02, 2023 1:26 pm
- Forum: Microscopy accessories
- Topic: Cleaning excitation filtres
- Replies: 13
- Views: 11555
Re: Cleaning excitation filtres
I am not on track with uploading images, but I think this link will allow you to see pictures of the Olympus BH2 G cube, and its opaque inner surface of the BP545 excitation filtre. It is blocking absolutely all light projected to it. The dichroic mirror and emission filtre seem good. https://photo...
- Sat Dec 02, 2023 11:43 am
- Forum: Camera systems and imaging
- Topic: Using Industrial Microscope Camera having panasonic CMOS sensor.
- Replies: 4
- Views: 4771
Re: Using Industrial Microscope Camera having panasonic CMOS sensor.
Likely, full control of the camera is only available when it is connected to the HDMI. I wonder about untold limitations in the declared simultaneity of output to HDMI and USB. Also, USB 2 is inadequate for decent videos. Also, the pushbuttons are small and dense and are possibly a source of vibrati...
- Fri Dec 01, 2023 10:40 pm
- Forum: Microscopy accessories
- Topic: Cleaning excitation filtres
- Replies: 13
- Views: 11555
Re: Cleaning excitation filtres
Thanks to everyone who has contributed to my many questions about epifluorescense. Being new to this modality, new issues keep coming up. One pf my filtre cubes has an excitation filtre that has accumulated something on the internal surface, to a degree where it is completely opaque, and no light i...
- Wed Nov 29, 2023 11:44 am
- Forum: My microscope
- Topic: reichert jung microstar 110 fluorescence
- Replies: 3
- Views: 4408
Re: reichert jung microstar 110 fluorescence
I can do blue excitation light. But i would like to see the red autoflorescence of vegetal stuff. I use a RGB LED torch that works wonderfully but i have two diferent position for the cube filter and i think that none of them allows for that. Should i try to change the filters in the cube? I think ...
- Tue Nov 28, 2023 12:45 pm
- Forum: Illumination Techniques
- Topic: Darkfield diagnostic test slide
- Replies: 26
- Views: 69113
Re: Darkfield diagnostic test slide
Perhaps a more or less uniform layer of small opaque particles of a defined diameter can serve for that purpose. Polystyrene spheres and other polymer particles are available from lab suppliers as suspensions that can be diluted with water as needed. A dried drop on the coverslip will make the test ...
- Sat Nov 25, 2023 9:17 pm
- Forum: Beginner's corner
- Topic: How to connect a microscope to a monitor
- Replies: 6
- Views: 4444
Re: How to connect a microscope to a monitor
Also note that the listed camera lacks a 0.5X reducing lens, which likely will provide a much wider FOV than without it, and that the FPS is relatively low at high quality video. I would prefer USB 3 rather than USB 2, if choosing an eyepiece camera. The listed camera appears to be bundled with a co...
- Fri Nov 24, 2023 12:27 pm
- Forum: Microscopy accessories
- Topic: BH-2 RFCA, filtre cubes, filtres and accessories
- Replies: 10
- Views: 6727
Re: BH-2 RFCA, filtre cubes, filtres and accessories
2) I understand what you write - but why is it in the analyzer slider? Any particular reason? What's the benefit of this, in lieu of placing it in the cube itself? Are an analyzer and cube installed together, such that the rays pass through both of them in series ? in that case, perhaps the previou...
- Thu Nov 23, 2023 9:54 am
- Forum: Microscopy accessories
- Topic: BH-2 RFCA, filtre cubes, filtres and accessories
- Replies: 10
- Views: 6727
Re: BH-2 RFCA, filtre cubes, filtres and accessories
Having had success in asking for help on lubricating the cube slider on my RFCA, I dare post a few more questions, as the epifluorescence modality and its various accessories are new to me - so here are my current inquiries: 1) What is the difference between the BH2-ANF and the analyzer dummy? I on...
- Wed Nov 22, 2023 4:28 pm
- Forum: Illumination Techniques
- Topic: DIY Fluorescence microscopy?
- Replies: 16
- Views: 11574
- Fri Nov 17, 2023 9:27 pm
- Forum: Microscopes and optics
- Topic: Meiji ML2000L for $150 reasonable?
- Replies: 11
- Views: 4696
Re: Meiji ML2000L for $150 reasonable?
What's even more ridiculous is I have a degree in molecular cell biology which required doing all sorts of microscopy (including plenty of fluorescence microscopy on organisms I had to genetically modify), although in my defense I don't use that degree for anything, and it's been many years since I...
- Tue Nov 14, 2023 3:32 pm
- Forum: Illumination Techniques
- Topic: Help: has anyone ever used Olympus DCW Darkfield condenser?
- Replies: 31
- Views: 99697
- Tue Nov 14, 2023 3:29 pm
- Forum: Illumination Techniques
- Topic: Help: has anyone ever used Olympus DCW Darkfield condenser?
- Replies: 31
- Views: 99697
Re: Help: has anyone ever used Olympus DCW Darkfield condenser?
Thank you all so much for the reply! I'll take a picture tonight to show how messy it is. The most difficult part is, I can not use centering Telescope to properly center it, it's just dark, not like with other condensers where you can try different stops to see where the boundary is. BTW, when I t...