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Anyone know a good place for supplies if I wanted to grind my own lenses? I found some used books in a dusty old bookstore in Chicago a few years back from around 1920 on DIY telescopes and I've always wanted to play around with them just because I enjoy tedious craftwork.
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# ¿ Jun 17, 2009 23:59 |
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# ¿ May 2, 2024 19:00 |