Archived posting to the Leica Users Group, 2001/06/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]MArk- The 'camera oscura' is literally a 'dark room' where an image is projected onto a wall opposite a lens or pinhole- the box could be small or large- from an actual room, to a cardboard box! The 'camera lucida' is/was an optical instrument that consisted of a lens and sometimes a mirror, that projected a bright image onto a drawing surface much like an opaque projector- similar set ups in theory, actually- but slightly different in operation. If you take a simple lens, hold is so an image is formed behind it, and then reflect the image down to a piece of paper, you have, basically, a camera lucida! I think the term was used also for a device that microscopists used to simultaneously look through a microscope ocular, and with the other eye open and focused on a piece of paper, the two images seemed to coincide- the microscope image, and the one the viewer was drawing- it was used to render views through the 'scope before it was fashionable to use a camera!!! Dan ( Old and treacherous trumps young and skillful!) Post - ----- Original Message ----- From: "Mark Rabiner" <mark@rabiner.cncoffice.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Friday, June 01, 2001 10:22 PM Subject: Re: [Leica] Bokeh - OT Long > Dan Hausman wrote: > > > > I wrote a Art History paper in 1979 on the fact that Vermeer used a camera > > Lucida to help his rendering, he even rendered the optical artifacts in his > > work. My art history prof said I was full of beans. HA! > > > > Dan pgw@ecr.net > > > I didn't think it was news that Vermeer used a camera obscura to help him with > his work as did other painters. But what the heck is a Lucida? > > > Mark Rabiner > > Portland, Oregon > USA > > http://www.rabiner.cncoffice.com/ >