猫五郎の写真日記

なんか、写真よりも文章がメインになってます。しかも、くどい。要改善。でもなかなかねぇ。

Optical axis adjustment of Newtonian telescope, Primary mirror adjustment first !

2024-07-31 16:21:36 | 天体望遠鏡
One day, when I was adjusting optical axis of Newtonian telescope, an idea came up to me.Why do we adjust secondary mirror first?It is the primary mirror that directly collects starlight and reflect i . . . 本文を読む
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