Archived posting to the Leica Users Group, 2001/06/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]For more info- check this site! http://www.newcastle.edu.au/department/fad/fi/woodrow/an-orig2.htm interesting! - ----- Original Message ----- From: "Dan Post" <dpost@triad.rr.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Friday, June 01, 2001 11:17 PM Subject: Re: [Leica] Bokeh - OT Long- and now for something entirely different! > 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/ > > > >