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Re:OpenFlexure Microscope, an open-source optical microscope by juskrey on Thursday May 20, 2021 @08:03AM (#27220047)
A piece of paper and glass for $10? I own $5 pocket microscope from aliexpress with good tube optics (as for $5), bright LED and easy one-hand operation, and it is excellent https://www.aliexpress.com/item/4000574841522.html
Re:OpenFlexure Microscope, an open-source optical microscope by LetThereBeLight on Thursday May 20, 2021 @12:08PM (#27222983)
It is $10 because the money from individual kits is being used to subsidize the foldscopes for classroom kits.

See "Why the difference in price between Deluxe Individual Kits and Classroom Kits?" in the FAQ: https://www.foldscope.com/faq