Zacharias Janssen
Zacharias Janssen; also
Zacharias Jansen or
Sacharias Jansen; 1585 – pre-1632) was a Dutch spectacle-maker who lived most of his life in
Middelburg. He is associated with the invention of the first
optical telescope and/or the first truly
compound microscope, but these claims (made 20 years after his death) may be fabrications put forward by his son.
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