Dobsonian

The two most useful eyepieces you can own probably aren’t the two that came in the box, and choosing them takes two numbers, not brand loyalty. Your telescope most likely arrived with a 25mm and a 10mm eyepiece. This piece is about what those millimetres actually do, why the 10mm is so uncomfortable to look through, and which two eyepieces to add first so you cover the sky from wide star fields to the cloud belts on Jupiter. No “best eyepiece” ranking. Just the arithmetic, worked on the scopes beginners actually buy. ...

If you have €120–€180 and you’ve never owned an astronomy instrument, buy a pair of 10×50 binoculars. Don’t buy a telescope. I’ve watched too many friends spend €200 on a wobbly 70mm department-store refractor, see Saturn as a tiny pixel-blur once, and shelve the thing for good. There’s exactly one case where that advice flips, and I’ll get to it. But the default answer, for the person walking into this hobby with no gear and no specific target in mind, is binoculars. ...