San Antonio tech inventor finds Vermeer through the looking glass - San Antonio Express-News
how to make a camera lucida
The basic optics of a camera lucida were described by Johannes Kepler in his Dioptrice (1611),
071 camera lucida - diagram
comment dessiner des portraits Plus
No, that is NOT a camera obscura!
Dessiner les têtes | leflux.fr
The LUCID-Art is a modern version of the classic camera lucida drawing tool that has been used by artists for centuries. Great Masters from Michelangelo Caravaggio and Jan Vermeer to Jean Ingres were said to have used camera lucidas and similar devices to help create some of their masterpieces (see video on lower right).