Sure, I can explain collimation and collimators in a way that a beginner can understand.

A collimator is a device that is used to make a beam of light or other radiation parallel. This is done by using a series of mirrors or lenses to bend the light rays so that they all travel in the same direction. Collimators are used in a variety of applications, including astronomy, microscopy, and medical imaging.

In astronomy, collimators are used to align the mirrors in a telescope. This is important because it ensures that the light from a distant object is focused into a single point, which produces a sharp image. If the mirrors are not aligned properly, the image will be blurry.

Collimators can also be used to adjust the focus of a telescope. This is done by moving the collimator closer to or further away from the telescope's primary mirror. By adjusting the position of the collimator, you can get a sharp image of any object that you are viewing.

If you are a beginner in astronomy, it is a good idea to have a collimator on hand. This will help you to keep your telescope in good alignment and ensure that you are getting the best possible images.

As for your question about telescope servicing addresses in Brixton, UK, I am not familiar with any specific addresses. However, I would recommend doing a quick Google search to find some options. There are a number of telescope retailers and repair shops in the UK, so you should be able to find one that is close to you.

I hope this information is helpful. Please let me know if you have any other questions.
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