Search found 3154 matches
- Tue Oct 24, 2023 6:52 pm
- Forum: Microscopes and optics
- Topic: 6 cent coverslips vs 24 cent coverslips
- Replies: 3
- Views: 1499
Re: 6 cent coverslips vs 24 cent coverslips
0,06$ means a pack of 100 is already at 6$. This is a not cheap for basic coverslips. Maybe you can find a different supplier with better prices and selection. Zeiss offers square cover slips of tight tolerance with a thickness of 0,17 +/- 0,005mm. As mentioned above these will only improve image qu...
- Sat Oct 21, 2023 6:28 pm
- Forum: Specimens, samples and slides
- Topic: Finally - an OK X-section
- Replies: 1
- Views: 2555
Re: Finally - an OK X-section
Hi Tony, here you can find a document on paraffin embedding and sectioning worms (in German): http://www.mikrohamburg.de/Tips/Paraffinschnitte_03.pdf For paraffin infiltration of plant material I use round about this method with isopropanol as intermedium and like the results: http://www.klaus-henke...
- Fri Oct 06, 2023 3:45 pm
- Forum: Specimens, samples and slides
- Topic: Water Sample Disposal
- Replies: 6
- Views: 4460
Re: Water Sample Disposal
I dispose samples from freshwater ponds simly in one of my pond aquariums. I habe posted here before how I set them up.
- Fri Oct 06, 2023 8:54 am
- Forum: Microscopes and optics
- Topic: On holiday at at St.Lawrence River, microscope info requested
- Replies: 14
- Views: 3093
Re: On holiday at at St.Lawrence River, microscope info requested
I wrote a bit about the separation of Zeiss after WW2: https://www.microbehunter.com/microscopy-forum/viewtopic.php?p=110505#p110505 In this situation it must have been quite dramatic to realize that they had developed the W model and it wouldn't fit the market. Maybe they were able to get a much be...
- Thu Oct 05, 2023 5:25 pm
- Forum: Microscopes and optics
- Topic: On holiday at at St.Lawrence River, microscope info requested
- Replies: 14
- Views: 3093
Re: On holiday at at St.Lawrence River, microscope info requested
Actually the KF and the GFL are not as similar as their look would suggest. On the KF coarse and fine focus are connected and move the stage, a quit emodern solution. On the GFL they are independent and the coarse focus moves the arm of the microscope, a more traditional setup. Both are very beautif...
- Sat Jul 29, 2023 6:33 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: A Zeiss Universal III to sell [sold!]
- Replies: 7
- Views: 2339
Re: A Zeiss Universal III to sell
The Phomi and Universal are a bit unwieldy but actually they take up just one microscope desk place. Only when one tries to lift them and put them elsewhere the wheight and bulk really shows. They don't go for much money and are comfortable and quick to use and top quality. And advanced options are ...
- Sat Mar 11, 2023 6:42 am
- Forum: Camera systems and imaging
- Topic: A potential Game-Changer
- Replies: 25
- Views: 8503
Re: A potential Game-Changer
Can you post a link to this camera, Phil? 5 mp sounds a lot less restricted than the 1,6 mp of the raspi camera.apochronaut wrote: ↑Thu Mar 09, 2023 3:07 pmI bought a dedicated microscope camera with s 5 mp sensor and global shutter about a year ago and it is definitely of value when capturing quick moving action on video.
Bob
- Sat Feb 18, 2023 8:53 pm
- Forum: Microscopy accessories
- Topic: Where to buy circular slide cover?
- Replies: 16
- Views: 5523
Re: Where to buy circular slide cover?
Here is a recent collection of microscopy material sources, mostly in Germany, it is no problem to get round cover slips: http://www.mikrohamburg.de/Linklisten/Linklisten%202021.pdf With round chinese cover slips I have made the experience that their thickness varied a lot, up to 0,25mm, and they we...
- Fri Feb 10, 2023 11:18 am
- Forum: Specimens, samples and slides
- Topic: Dammar / Damar resin as slide mountant - how to prepare it
- Replies: 7
- Views: 4554
Re: Dammar / Damar resin as slide mountant - how to prepare it
The recipe I posted contains the least possible amount of solvent. It is on the border of being too stiff at room temperature. The advantage is that not much shrinkage occurs.
- Wed Feb 08, 2023 8:58 pm
- Forum: Specimens, samples and slides
- Topic: I hate bubbles.
- Replies: 15
- Views: 6695
Re: I hate bubbles.
The amount of trouble with bubbles depends on what you do with the mountant, like shaking, carrying it. And it depends on the mountant itself, some hame much more problems with bubbles than others. For plant stem sections Euparal works fine and has little problems with bubbles. What do you do with y...
- Wed Feb 08, 2023 8:41 pm
- Forum: Microscopes and optics
- Topic: Improving a toy microscope..add a condenser?
- Replies: 30
- Views: 56262
Re: Improving a toy microscope..add a condenser?
What you want is a lens that offers a light cone with a wide included angle, a lens of e.g. 20-35mm and quite fat in the middle with a short focal lenght.
- Tue Feb 07, 2023 7:20 am
- Forum: Microscopes and optics
- Topic: Improving a toy microscope..add a condenser?
- Replies: 30
- Views: 56262
Re: Improving a toy microscope..add a condenser?
Here was a topic on portable microscopes: https://www.microbehunter.com/microscopy-forum/viewtopic.php?f=18&t=7632&hilit=field+microscope+meopta It is not difficult to find one for 200x combined magnification but becomes increasingly dificult to find something light an daffordable with higher magnif...
- Sun Feb 05, 2023 8:04 am
- Forum: Microscopes and optics
- Topic: Improving a toy microscope..add a condenser?
- Replies: 30
- Views: 56262
Re: Improving a toy microscope..add a condenser?
I once had a microscope that has cost 40€ new with quite acceptable objectives 4:1, 10:1 and 40:1. It was mainly let down by the very low numeric aperture of the illumination. I installed a small camera objective below the stage, oriented so the front lens faces the light source. This improved image...
- Sat Feb 04, 2023 9:33 pm
- Forum: Microscopes and optics
- Topic: EM1 portable microscopes
- Replies: 13
- Views: 5278
Re: EM1 portable microscopes
The EM-1 is advertised over a Kickstarter crowd funding scheme - not very convincing when it is already developed and in production. At least one of the application photos was reused from the Newton homepage with just a little editing of the photo. I always found the Newton nm-1 interesting but it's...
- Sun Jan 29, 2023 2:58 pm
- Forum: Beginner's corner
- Topic: Help with decision on Leitz Orthoplan
- Replies: 51
- Views: 11473
Re: Help with decision on Leitz Orthoplan
The main problem with transmitted light fluorescence, which made it outdated long ago, is that it is extremely wasteful of illumination. Fluorescence requires both intense illumination for excitation AND efficient removal of that exciting light such that the fluorescence sensor (eye, camera, whatev...
- Sat Jan 28, 2023 8:27 pm
- Forum: Beginner's corner
- Topic: Help with decision on Leitz Orthoplan
- Replies: 51
- Views: 11473
Re: Help with decision on Leitz Orthoplan
As long as you use 170mm eyepieces on your 170mm microscope, both 160mm and 170mm objectives will work ok, as the location of the image only differs by 2mm, as seen here: https://www.microbehunter.com/microscopy-forum/viewtopic.php?p=77060#p77060 I really like the 170mm Pl Fl objectives I've tried,...
- Sat Jan 28, 2023 7:58 am
- Forum: Beginner's corner
- Topic: Help with decision on Leitz Orthoplan
- Replies: 51
- Views: 11473
Re: Help with decision on Leitz Orthoplan
Congratulations, you've got a very nice microscope there! The Orthoplan arrived on the market in the 1960s and this was still Leitz 170mm era. They were changed to 160mm later. So when looking for parts it will be important to know which components are compatible. I posted a link to the german forum...
- Sat Dec 31, 2022 2:25 pm
- Forum: Microscopes and optics
- Topic: Zeiss 4X objective
- Replies: 20
- Views: 4055
Re: Zeiss 4X objective
Hi Keith, a good and very short objective that fits well to your Zeiss West Standard would be the Leitz EF 4. It is shorter than the Zeiss Plan 2,5. You might already be aware of this but there were two Zeiss companies between 1945 and 1990: Zeiss Jena and Zeiss West (Oberkochen and Göttingen). Ther...
- Sun Dec 25, 2022 7:11 pm
- Forum: Specimens, samples and slides
- Topic: Dammar / Damar resin as slide mountant - how to prepare it
- Replies: 7
- Views: 4554
Re: Dammar / Damar resin as slide mountant - how to prepare it
It would be interesting to hear when you try the recipe or adjust the procedure to the equipment you have available. It would also be interesting to hear how well you can get dammar and xylene in your country. One remaining information: Dammar has green fluorescence when excited with blue, like prob...
- Sun Dec 25, 2022 6:59 pm
- Forum: Specimens, samples and slides
- Topic: Dammar / Damar resin as slide mountant - how to prepare it
- Replies: 7
- Views: 4554
Re: Dammar / Damar resin as slide mountant - how to prepare it
Since Dammar doesn't dissolve well in alcohols I don't think it is likely that it will fully tolerate alcohol when dissolved in turpentine. In my eyes Dammar is similar in use to canadabalsam, intermedium xylene, not tolerant of water. Compared with canadabalsam I would say it is a bit less variable...
- Sun Dec 25, 2022 4:52 pm
- Forum: Specimens, samples and slides
- Topic: Dammar / Damar resin as slide mountant - how to prepare it
- Replies: 7
- Views: 4554
Dammar / Damar resin as slide mountant - how to prepare it
Hi together, quite often the topic arises of which mountants to use and where to get them. Often stuff like nail polish (where does this idea come from? :roll: ) is tried, discovered as not very usable and abandoned. In some countries a variety of proven mountants is available but this is by far not...
- Sun Dec 25, 2022 4:24 pm
- Forum: Resources (online, books etc.)
- Topic: English pages on www.mikrohamburg.de - lots of micro methods
- Replies: 1
- Views: 2991
English pages on www.mikrohamburg.de - lots of micro methods
Hi together,
here a link to a lot of descriptions of micro methods on our english pages on www.mikrohamburg.de:
http://www.mikrohamburg.de/HomeTips_E.html
Bob
here a link to a lot of descriptions of micro methods on our english pages on www.mikrohamburg.de:
http://www.mikrohamburg.de/HomeTips_E.html
Bob
- Wed Dec 21, 2022 9:13 pm
- Forum: Microscopy accessories
- Topic: A pocket camera adaptor
- Replies: 2
- Views: 1878
Re: A pocket camera adaptor
In my experience the lenses of these cameras show defects when used on the microscope that doesn't show in normal photography. This limits the acheivable image quality. This effect comes from the way the plastic lenses are made and from dirt inside the objectives. The problem mostly shows in stronge...
- Wed Dec 21, 2022 11:39 am
- Forum: Microscopy accessories
- Topic: A home made field microtome
- Replies: 1
- Views: 1704
Re: A home made field microtome
Thank you for this description, it is a very nice microtome design. What I like best is the combination of carrot-punch and microtome.
If you find need for stiffer blades the Olfa LBB blades are much thicker and equaly sharp.
If you find need for stiffer blades the Olfa LBB blades are much thicker and equaly sharp.
- Wed Nov 30, 2022 9:46 pm
- Forum: Beginner's corner
- Topic: Carl Zeiss Standard 14 advice
- Replies: 37
- Views: 15449
Re: Carl Zeiss Standard 14 advice
Congratulations! The delamination might be outside the field of view or not be well visible anyway. The fine focus gears of this series is much more robust than usual so there is no immediate risk of wrecking it when it moves a little stiff. Condenser rack-is there a nut with two holes? Stage should...
- Wed Nov 30, 2022 3:08 pm
- Forum: Beginner's corner
- Topic: Carl Zeiss Standard 14 advice
- Replies: 37
- Views: 15449
Re: Carl Zeiss Standard 14 advice
To compensate for the yellowish light you would need a blue filter.
These original transformers are durable but quite impactical in use. There are ready made LED conversions and it is not that difficult to build one yourself.
These original transformers are durable but quite impactical in use. There are ready made LED conversions and it is not that difficult to build one yourself.
- Tue Nov 29, 2022 3:17 am
- Forum: Beginner's corner
- Topic: Carl Zeiss Standard 14 advice
- Replies: 37
- Views: 15449
Re: Carl Zeiss Standard 14 advice
I would suggest a lab power supply with adjustable voltage AND current. It can power the bulb as well an an LED in case you do this upgrade later. I'm not sure as I've never used it one, how do you limit the max voltage or current? It seems quite unhandy if one needs to look at the screen while tur...
- Mon Nov 28, 2022 1:17 pm
- Forum: Beginner's corner
- Topic: Carl Zeiss Standard 14 advice
- Replies: 37
- Views: 15449
Re: Carl Zeiss Standard 14 advice
I would suggest a lab power supply with adjustable voltage AND current. It can power the bulb as well an an LED in case you do this upgrade later.
- Sat Nov 26, 2022 9:22 am
- Forum: Beginner's corner
- Topic: Carl Zeiss Standard 14 advice
- Replies: 37
- Views: 15449
Re: Carl Zeiss Standard 14 advice
As far as I know the delamination tendency was caused by the way the uv-glue was stored and handled, so there would be reason for different levels of delaminating tendency in different products and from different production times, maybe even markets. I myself have found im the stuff I got my hands o...
- Sat Nov 26, 2022 7:05 am
- Forum: Beginner's corner
- Topic: Carl Zeiss Standard 14 advice
- Replies: 37
- Views: 15449
Re: Carl Zeiss Standard 14 advice
Basic Zeiss West optics don't tend to delaminate much, it is more the better corrected objectives that have this problem. On the other hand side for most other systems there never was a Planapo 63 /1,4.. Leitz earlier used 37mm objectives, then 45mm objectives. The 45mm objectives 170 and 160mm can ...