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The condenser is a lens or series of lenses that usually sits just below the microscope stage. Its role is to focus the light into an even illumination to give a clear and undistorted view of your samples.

If you’re looking to maximise resolution, match the aperture setting (the numbers below the control lever) to the numerical aperture (NA) value of the objective lens you’re using.

Glasses are a piece of equipment that is often used every day and can therefore easily get dirty due to external elements or rubbing against the skin. It is therefore essential to clean them regularly, both the lenses and the frame, mainly using a microfibre cloth. However, if the latter is itself soiled, it will not be able to clean your glasses properly and may even soil them further. In fact, when it is dirty, the cleaning cloth will transmit the dirt particles to the glasses on which it is rubbed. In addition, when a dirty microfibre cloth is rubbed over the lenses, it does not restore their original clarity as well as a clean cloth can. The dirty cloth may even dull the lens even more, or even scratch it slightly. However, a microfiber cloth for glasses will tend to get dirty quite easily. Indeed, it is not always stored as well as it should be on a daily basis, due to lack of time or attention. And even when stored in the spectacle case, the cleaning cloth still needs to be cleaned regularly since it takes up all the dirt it removes from the glasses.

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You can increase or decrease the size of the aperture that the light passes through using a simple lever on the side of the condenser.

To take good care of your glasses, it is essential to clean them regularly, especially with the help of cleaning cloths. However, it is important to ensure that the cleaning rag used is itself clean so that it can perform its function properly. Here's why it's imperative that your eyewear cleaning cloth is clean and how to properly wash it without damaging it.

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But note that you can’t increase the resolution beyond the NA value, so opening the diaphragm any further won’t give you any additional benefits.

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These essential components play a critical role in the quality of your images – and you’ll need to understand a little of their nuances to get a sharp, well-contrasted look at your samples.

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Once the need to clean your eyewear cleaning cloths has been taken into account, you need to know how to do it. Indeed, it's necessary to clean the microfibre cloth well so that it does not get damaged and that it regains its initial effectiveness. Indeed, as well as knowing how to properly clean your glasses, it is imperative to know the correct procedure for your cleaning cloth. To do this properly, it is advisable to use cold water and mild soap. The microfiber cloth should be left to soak for a few minutes and then rinsed again with cold water. Although effective, cleaning it in a washing machine can damage the cloth if it is done too often. Finally, a glasses cleaning cloth that is too damaged or too worn must be replaced. Do not hesitate to ask your Optical Center optician for a new one and make sure you wash your new cleaning cloth regularly.

Everyone’s preferences and specimens are different, so don’t be afraid to play around with the settings until you find that sweet spot!

Collectively, they determine resolution, contrast and depth of field. The position of that little lever decides whether you’ll see a washed-out mess or a crisp, detailed specimen.

Closing the diaphragm will increase the contrast and depth of field, but at the expense of resolution and brightness. Opening it up will do the opposite.

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The aperture diaphragm, also known as the iris or iris diaphragm, consists of a circle of interlocking petals or blades that sits within the condenser. It functions a bit like curtains, controlling the amount of light that gets through the condenser.

While it can be helpful, it can also introduce a few optical issues. Dust and debris on the cover slip or optical surfaces can become more visible and obstruct the view, and specimen structures can overlap or become hidden.

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You can’t have it all, so it’s about finding the right balance for the specimen at hand. A rule of thumb is to have the diaphragm 50 to 90% open for a good mix of resolution and contrast.

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While it sounds like they simply act as another illuminator control or a glorified dimmer switch, they actually have a massive impact on the quality of your images.

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If you’re interested in making the most of your microscope, you’ll want to get to grips with the condenser and aperture diaphragm on your scope.

Many novice users are tempted to close the iris and crank up the illuminator setting for a bright, yet highly contrasted image. But hold on a sec!

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