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Focusing is of paramount importance whether you're an imager or a visual astronomer. When chosing a focuser for your application, consider the degree of precision required and the weight of either your average imaging set up or your heaviest eyepiece. Read on to find out more about each focuser design and the various focusing aids that will help you focus those objects into sharp detail you can buy it on EBay

You can do it by hand with Aluminium alloy tube very easy and cheap

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