It's a holdover from the days when people in studios, or who were doing critical close-up work, tried to achieve precision focus by measuring the distance from the subject to the film plane with a tape measure and then setting the lens accordingly, rather than using a built-in focusing facility in the camera.
For all I know, some photographers still do that, but I suspect it's not many. --Ken S. > I have another curiosity: what's the use of the sign that > shows where the film plane is? I mean the circle crossed > by a horizontal line, located on the top of the camera, > near the flash housing. > Yes, I understand that it shows exactly where the film is > located, but why would I need this information? * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
