Search found 4027 matches
- Tue Apr 02, 2024 6:38 pm
- Forum: Microscopes and optics
- Topic: Averaging condenser and objective numerical aperture when predicting resolution
- Replies: 49
- Views: 4783
Re: Averaging condenser and objective numerical aperture when predicting resolution
… Is there still more to it than this? I think the “more to it” is probably Modulation Transfer Function . I am feeling too old and tired at the moment to get involved in this discussion but, if my memory serves, this is a big step in the right direction when trying to understand the difference in ...
- Tue Apr 02, 2024 5:53 am
- Forum: Microscopes and optics
- Topic: Averaging condenser and objective numerical aperture when predicting resolution
- Replies: 49
- Views: 4783
Re: Averaging condenser and objective numerical aperture when predicting resolution
I still have not figured out how to post images into these threads … . It would be very helpful if you could ^^^ The process is relatively simple, but only permits the use of small file sizes At the bottom of the composition-pane, there is a tab labelled Attachments via which you can insert images ...
- Mon Apr 01, 2024 5:00 pm
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
A different mystery today … How do I free-up the CT focus ring ? This is stacked above the Magnification Changer, and illustrated in the exploded parts diagram: . IMG_9342.jpeg . But it is not obvious how it actually operates. … The two rings currently appear to be locked firmly together, but I susp...
- Mon Apr 01, 2024 7:06 am
- 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: 786
Re: Searching For: Extention between intermediate tube and the observation tube for an IMT-2 Olympus Inverted Microscope
Thanks for posting that, Pete
… I understand a little better now.
MichaelG.
… I understand a little better now.
MichaelG.
- Sun Mar 31, 2024 6:53 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: 786
Re: Searching For: Extention between intermediate tube and the observation tube for an IMT-2 Olympus Inverted Microscope
CK40-EPA is mentioned twice on page A-3 of this document,
https://www.alanwood.net/downloads/olym ... manual.pdf
… but frankly, I don’t understand what they are saying
MichaelG.
https://www.alanwood.net/downloads/olym ... manual.pdf
… but frankly, I don’t understand what they are saying
MichaelG.
- Sun Mar 31, 2024 3:49 pm
- Forum: Pictures and Videos
- Topic: Everything looks better in slow motion
- Replies: 12
- Views: 1158
Re: Everything looks better in slow motion
Nice !
MichaelG.
MichaelG.
- Sun Mar 31, 2024 7:42 am
- Forum: Pictures and Videos
- Topic: Everything looks better in slow motion
- Replies: 12
- Views: 1158
Re: Everything looks better in slow motion
Please forgive the slight digression, but this paper is rather impressive:
https://www.semanticscholar.org/paper/A ... b8209407e2
MichaelG.
https://www.semanticscholar.org/paper/A ... b8209407e2
MichaelG.
- Sun Mar 31, 2024 7:16 am
- Forum: Pictures and Videos
- Topic: Everything looks better in slow motion
- Replies: 12
- Views: 1158
Re: Everything looks better in slow motion
Hi, […] but usually, they seem to be described as being short. Here you see the difference of cilias length, of the same protozoa, my camera/video/setup not being able to catch the details at such high speeds: […] You make a very good point … but perhaps that ‘short’ description reveals that most p...
- Sat Mar 30, 2024 5:33 pm
- Forum: Digital processing
- Topic: Chromatic aberrations filtering
- Replies: 52
- Views: 4098
Re: Chromatic aberrations filtering
This page may be of interest:
https://www.kodak.com/en/motion/page/w ... 2-filters/
lots of transmission curves for download.
MichaelG.
https://www.kodak.com/en/motion/page/w ... 2-filters/
lots of transmission curves for download.
MichaelG.
- Sat Mar 30, 2024 5:13 pm
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
Thanks for the encouraging endorsement … I must say that I am delighted with it so far
… and the ‘correction collar’ adjustment for 0 to 2 mm glass thickness is astonishing, and effective.
MichaelG.
- Sat Mar 30, 2024 8:03 am
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
I hope these snapshots will clarify The housing is simply a shielded and ventilated box that clamps on with a single knurled screw … beautifully built, but just a cover. The bulb-holder is a fixed installation in the frame of the microscope … the white wiring can just be seen in one image. In short,...
- Sat Mar 30, 2024 7:11 am
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
.
Thanks for the sanity-check, Tom
… I wonder how many they made
… or how few
Do you happen to recall the serial number of yours ?
MichaelG.
Thanks for the sanity-check, Tom
… I wonder how many they made
… or how few
Do you happen to recall the serial number of yours ?
MichaelG.
- Fri Mar 29, 2024 10:03 pm
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
Michael, Fig 20 on that list hints (maybe) that there was more than one illumination housing. So, while a 50W lamp seems the default, perhaps there was a 100 W - for more demanding modalities ? fluorescence with a 100W halogen lamp comes to mind, although the during the IMT-2 era, epifluorescence w...
- Fri Mar 29, 2024 9:38 pm
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
Indeed it does, Pete
In fact it explicitly states LAMP 12V 100W
MichaelG.
In fact it explicitly states LAMP 12V 100W
MichaelG.
- Fri Mar 29, 2024 9:36 pm
- Forum: Microscopes and optics
- Topic: Mystery Carl Zeiss Microscope
- Replies: 5
- Views: 889
- Fri Mar 29, 2024 9:03 pm
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
Michael, I suspect your scope should have the black metal 50-watt halogen illuminator - and that someone switched lamp housings along the way . If you check the electrical plate for your scope, it may shed light (metaphorical kind) on what lamp wattage the power supply can reliably support. If the ...
- Fri Mar 29, 2024 3:36 pm
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Re: Olympus IMT-2 mystery
Thanks for the comments, and the link Just to be clear … my IMT-2 has no umbilical, and no provision for plugging one in. The lamp is powered internally … which presumably means that microscope PSU design was upgraded at some stage in the product development. It may be worth mentioning that the Seri...
- Fri Mar 29, 2024 8:34 am
- Forum: Microscopes and optics
- Topic: Olympus IMT-2 mystery
- Replies: 17
- Views: 2225
Olympus IMT-2 mystery
I have recently acquired a fairly basic IMT-2 which is causing me some confusion The Halogen lamp-house looks very much like the one for the BH-2 and does not have the very distinctive umbilical cord that seems to feature in all the available IMT-2 literature. It is also very clearly labelled as usi...
- Fri Mar 29, 2024 8:08 am
- Forum: Microscopes and optics
- Topic: Olympus X-Line Objectives
- Replies: 6
- Views: 1320
Re: Olympus X-Line Objectives
Thanks, Pete … I suspect we will see more reactions in similar vein.
The video was just included in a very friendly, but ultimately not very helpful, response to a question I asked about my recently acquired IMT-2
I will start a new thread on that topic.
MichaelG.
The video was just included in a very friendly, but ultimately not very helpful, response to a question I asked about my recently acquired IMT-2
I will start a new thread on that topic.
MichaelG.
- Fri Mar 29, 2024 5:33 am
- Forum: Pictures and Videos
- Topic: Everything looks better in slow motion
- Replies: 12
- Views: 1158
Re: Everything looks better in slow motion
This is very impressive
… Keep up the good work
MichaelG.
… Keep up the good work
MichaelG.
- Fri Mar 29, 2024 5:30 am
- Forum: Microscopes and optics
- Topic: Olympus X-Line Objectives
- Replies: 6
- Views: 1320
Olympus X-Line Objectives
I received this promotional link from Evident, and am posting it here for general interest/discussion https://view-su3.highspot.com/viewer/66045456bc8bc3417086b790?iid=635b9ea473b518b8afacceb5 MichaelG. . Edit : __ This ‘white-paper’ contains more technical detail https://static2.olympus-lifescience...
- Sun Mar 24, 2024 8:35 am
- Forum: Beginner's corner
- Topic: Centering & adjusting the Leitz 100Z lamp?
- Replies: 12
- Views: 1526
Re: Centering & adjusting the Leitz 100Z lamp?
Is your Orthoplan a standard instrument, or a ‘bitza’ ? [ bitza this, and bitza that ] It looks to me like you need to first make some reasonably simple measurements of what your illumination system is actually doing … and then compare with those listed values. Note particularly the reference to IV ...
- Sat Mar 23, 2024 8:03 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: [Sold] Zeiss Axio Imager Z1 w. motorized stage
- Replies: 5
- Views: 1874
- Sat Mar 23, 2024 1:51 pm
- Forum: Beginner's corner
- Topic: Centering & adjusting the Leitz 100Z lamp?
- Replies: 12
- Views: 1526
Re: Centering & adjusting the Leitz 100Z lamp?
You should be able to make a replacement disc from a sheet of tracing paper or similar
… it’s just a target; the screws do the adjustment.
MichaelG.
.
Alexander beat me to it !!
- Fri Mar 22, 2024 7:48 am
- Forum: Microscopy accessories
- Topic: Motorized Rotating Display Stand
- Replies: 16
- Views: 1375
Re: Motorized Rotating Display Stand
I would recommend watching Part_1 of that YouTube series by ‘Gordon’ to get a good appreciation of the whys and wherefores
MichaelG.
MichaelG.
- Tue Mar 19, 2024 11:22 pm
- Forum: Microscopy accessories
- Topic: Motorized Rotating Display Stand
- Replies: 16
- Views: 1375
Re: Motorized Rotating Display Stand
Just one thought … my reading of the Amazon listing is that it turns at 1-2 revolutions per minute !
If I am correct, that is very slow for the purposes you have in mind.
MichaelG.
If I am correct, that is very slow for the purposes you have in mind.
MichaelG.
- Tue Mar 19, 2024 7:42 am
- Forum: My microscope
- Topic: Picked up a legacy Zeiss
- Replies: 7
- Views: 1981
Re: Picked up a legacy Zeiss
That looks like a very useful/useable hybrid … nice find !
MichaelG.
MichaelG.
- Sun Mar 17, 2024 8:21 pm
- Forum: Pictures and Videos
- Topic: The Current Biofilm
- Replies: 4
- Views: 275
Re: The Current Biofilm
Well done, Don !
MichaelG.
MichaelG.
- Sun Mar 17, 2024 3:53 pm
- Forum: Pictures and Videos
- Topic: Internet Problem
- Replies: 6
- Views: 674
Re: Internet Problem
Hello, Don
I have just looked-back at some of your videos … they appear to be on YouTube
https://www.youtube.com/@DonSchaeffer-ew3dz
Sorry … I don’t use it myself, so can’t help regarding your log-in problem.
MichaelG.
I have just looked-back at some of your videos … they appear to be on YouTube
https://www.youtube.com/@DonSchaeffer-ew3dz
Sorry … I don’t use it myself, so can’t help regarding your log-in problem.
MichaelG.
- Sun Mar 17, 2024 10:27 am
- Forum: Microscopes and optics
- Topic: Leitz Diavert, modernization (kind of)
- Replies: 7
- Views: 689