On Dec 20, 2005, at 2:07 PM, Tim Sherburne wrote:
Are you sure they're not accomplishing the TTL metering another
way? AFAIK, the LX is the only Pentax body with "off-the-film"
metering, but
there are plenty of Pentax bodies with TTL flash metering
capabilities.
Well, they is no pre-flash, and they have read the light coming
through the lens at exposure time. The mirror is up, so you can't
read it off the focusing screen, and you can't read it on the way to
the sensor without whatever you're using to read it being in the way
of the sensor. Therefore, they have to be reading it as reflected off
the sensor.
Godfrey
