On Dec 20, 2005, at 1:07 PM, Jack Davis wrote:
Do any digital SLR's provide Off The Sensor metering? I gather not..(?)
TTL flash metering is supported by the D (built-in flash when using lenses that do not support P-TTL metering) and by the DS/DS2 when using a compatible dedicated external flash unit. Due to the nature of TTL flash metering, it must be reading "off the film/sensor" since it is determining light levels dynamically at the time of exposure.
The TTL ambient light metering is all pre-exposure, through a sensor system fed by semi-silvered portions of the mirror and above the focusing screen.
Godfrey
