手作り望遠鏡リベンジ
焦点距離が重要というのがわかったので、100均で使えそうなレンズを物色。いろいろ試した結果、老眼鏡とスマホ用接写レンズの組み合わせが良い感じ。
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on 木曜日, 6月 20th, 2019 at 12:49:19 and is filed under 子供.
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