Robert Hooke is one of the first scientists to build and use a compound microscope, a multiple lens assembly, usually three in number: an eyepiece, a field lens, and a lens. He gives many tips for the manufacture of microscopes manufacturer Christopher C-o-c-k. But this attribution seems inaccurate, because Zacharias Janssen had already built similar microscopes in 1590. Nevertheless, the Hooke microscopes reached a magnification of 30 times, which was much superior to the previous instruments
