Archived posting to the Leica Users Group, 2000/08/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Wed, 23 August 2000, "Dan Honemann" wrote: > > Ok, here's a dumb question (so those of you who have low tolerance for dumb > questions can skip to the next msg now). The M6 TTL meters off of a white > dot on the shutter curtain. Why isn't the dot 18% grey? Does the meter > test light reflected off both the white dot and some of the black curtain so > that the composite represents grey? > > I'm assuming the meter works by comparing the reflected light through the > lens to the light reflected off the white dot. > > Curious Dan Dan, The meter works by measuring how much light falls on the dot. The dot is white to maximize meter sensetivity, and to localize sensetivity in a limited area. It's a surrogate for having the meter cell itself in front of the shutter curtain, as in the Leica CL or M5. Doug Herr Birdman of Sacramento http://ourworld.compuserve.com/homepages/telyt - -------------------------------------------------- Visit the Northwestern Alumni Association portal page at http://www.nualumni.com to get free web-based e-mail and many other exciting features.