Advice

Procedures, step by step, in sequence

Every page here follows one job through from the first step to the last check, and names the step that everything downstream depends on. Products appear only where a procedure genuinely needs one — and several of these end by recommending no purchase at all, because collimating a tube or letting it cool does more than a new eyepiece would. Where the answer turns on your own sky, your own instrument or a limit the maker sets, the page hands over to the documentation.