MicrobeHunter.com Microscopy Forum

A microscope designed for LED illumination presumably has illumination optics (collector and field lens) appropriately designed to control stray light, avoiding halos; my comments above were about LED conversions from halogen. At least some Nikon and American Optical models (two microscope brands w...

Reliable sources for new and 2nd hand scopes in Europe when I bought my first microscope I discarded the used market of the expensive brands (Olympus, Nikon.. ). Is too expensive anyway. Somebody can buy a 30-40 years old Olympus device probably with achro objectives and risks of imperfections or d...

It is ridiculous how cheap some things are direct from China. I have gotten a couple things with QC issues but nothing too insane. bad thing is when buying directly from China will have VAT taxes and import duties. It can arrive until 40% depending countries. I doubt strongly that an individual buy...

Anyway, my question is: in the European market, is there something comparable to the BoliScope? A nicely built and equipped scope at a good price? Hiding on some obscure optics supplier’s catalog? the microscope you post is mounting simple achro objectives and the head and chassis are old. In Europ...

Microscope collector lens for halogen bulb is designed for relatively small square filament; larger area LEDs provoke stray light that bounces inside microscope against reflective mostly cylindrical and conical surfaces, resulting in halos. that's interesting because I'm reading some things in the ...

This is what I did, look at the last post for the latest version. Dimmer works great. Higher voltage doesn't mean higher temperatures, higher power (watts) mean more temperature... You can limit the upper voltage, consequentially current (power) and light power up to the limit which your LED (heats...

apparently, these dimmers are of constant voltage and driver integrated. Characteristics are these: - Supply voltage: applicable between DC 3.7V-24V - Output voltage: equal to the input voltage - Load power: use within 4A (V*I=P) - Standby power consumption: 0 power consumption in standby after turn...

I need more light and did the converse: I found a flickerless dimmer I understand, although your solution is different. Note those tiny dimmers are smaller, and avoid the install of driver and potentiometer . https://ae01.alicdn.com/kf/S6301a296dd944f1f9349779c2b5c7bb44/LED-Constant-Voltage-Dimmer-...

Hi, I'm very interested in these tiny dimmers without flickering to try a LED replacement. One dimmer works with input 6-24V, the other with 3,7-24V https://ae01.alicdn.com/kf/S6301a296dd944f1f9349779c2b5c7bb44/LED-Constant-Voltage-Dimmer-Module-Light-Strip-With-Switch-Board-Brightness-Adjustment-Ad...

BTW, FYI for others, I emailed Robert. One piece is 15$, min. 50 pieces ( if I understood MOQ correctly) and 66$ shipping for Canada. So, no go. Hope it will show up in AliExpress soon for me to try. what a pity. I know another LED G4 at 6V, although only 1w. Far from previous model with 5w CREE. I...

thank you ldflan, Scarodactyl for that site

a direct G4 CREE replacement, from a chinese manofacturer. I cannot find something similar to be purchased by unities Please, if somebody knows something similar, I would be grateful to know https://www.mayduly.com/uploads/20190518/313988ff5639572cf60f4673592bdc5d.jpg Characteristics (Google transla...

I don't have have that microscope. I include that microscope only like one example of Kôhler illumination different from using a reflecting mirror Always best when you show an actual image of your own microscope, as the advice given may then vary. However in this case (as in a completely different ...

If no cheap parts available, the diaphragms and 3D print are cheap. . It seems that Euromex do have a Köhler upgrade for the bScope. You might want to ask what that entails. Also, they say that their illumination is adjustable - perhaps they can clarify that. I don't have have that microscope. I in...

Whether [or not] the additional lens is needed will depend upon the light source and the design of the Collector Lens [see Fig.1 in your link] … You need whatever gives the appropriate output beam at the Field Stop Diaphragm. thanks. I think I understand now. The confussion was the different design...

Do you mean modern microscopes like this also are using a similar lens system?. https://www.zeiss.com/microscopy/int/solutions/reference/basic-microscopy/koehler-illumination/j/m/corpimageml_254f/image.mobile.980.jpg/1484666791857.jpg/basic-microscopy-k%C3%B6hler5.jpg Or maybe they are integrating a...

May I suggest that to watch the first section [21 minutes] of Peter Evennett’s video demonstration: https://youtu.be/60_jgZtyR6U He shows, with unusual clarity, how Köhler illumination works … far better than trying to follow static descriptions and ray diagrams. thank you. Very good video. I agree...

Hi Dubious, yes, the condenser is under the specimen stage. It is an Abbe 1.25 with diaphragm and 2 centering screws. I have one hallogen bulb. Good to know it is best for filament light. My doubt about Kohler is precisely to know if there is any additional part besides that diaphragm embedded into ...

Hi, I'm reading articles like this about Köhler illumination although they don't talk about special condensers to use: https://www.zeiss.com/microscopy/int/solutions/reference/basic-microscopy/koehler-illumination.html https://www.zeiss.com/microscopy/int/solutions/reference/basic-microscopy/koehler...

I can say that if I plug the camera into a USB port on my MacBook, the card in the camera does not show up on the computer, but a window appears on the HDMI monitor that says "PC Camera". No functions seem to work on the camera when the usb is connected. I have one industrial camera and I have solv...

maybe you can try with the ImageFocus Alpha for Linux, from Euromex.
I believe the same Toupview software although different version

https://www.euromex.com/en/download/

thank you MicroBob for these links and explanations, really helpful!

I understand. My main interest in plan objectives is not for eyes but for the camera. I have found this thread in the topic with some images, and the change is better at higher magnifications. I will try 60x https://www.microbehunter.com/microscopy-forum/viewtopic.php?t=9846 https://i.imgur.com/vyG2...

Ok. Two schools of thought here. Separating microbes from soil can be done at 4000 rpm or less. I wonder about some home made solution using the rotor of a Dremel rotary. It can reach even 30.000 rpm. iy4aNuLzxbs How long time is needed for different common centrifugations?. Is there some table or ...

Hi, I want to buy one plan objective to check the difference field with common achromatic objective. My microscope have 4x, 10x, 40x, 100x + one additional 60x . Also I use camera. I use more extensively 40x and 60x, although I'm not sure if the plan field can be more profitable for the others sizes...

I don't really know what you have available for you where you shop but I can make a few comments. The first is that at this level, brand isn't very significant in most cases. They all import from the same few Chinese factories. EuroMex is the European division of AmScope and they carry the same typ...

Hi all, I'm 36, located in Belgium and on the fence regarding a dive into microscopy as a new hobby, not linked to work (IT) or other hobbies. I want to heed the advice regarding a first microscope, which is to not spend too much right away. A lot of recommendations seem to be US-based but I prefer...

finally I have followed the advices here and I bought a decent new microscope under a good discount. It has Abbe 1.25 and semi-plan objectives 10,20,40,100(oil inm). I believe the reason for the discount was the halogen light, which today I don't care. Now I should start another headache to find a c...

I presumed it had at least an adjustable condenser; still, nothing is impossible, but it might be less effort and expense finding another scope which has one. these changes would be less than 50€ while microscopes 100x are around 250€-400€. Not directly a problem to spend more money (despite this i...

sounds good, thanks for the help!. Hope I can do it. I cannot find used microscopes with Abbe 1.25 with a good price. Although I have find both the 100x objective and Abbe condenser and this is affordable to me. My doubt is about some optic incompatibility by design. If the problems are only about s...