Mark Lee
4th of May 2005 (Wed), 02:05
I have some question..
Does 20D Flash Metering use all 35 Metering Zone??
Canon EOS 20D DSLR Preview (http://photo.net/equipment/canon/20D/eos20d_review_2.html)
Evolved E-TTL II Flash Exposure Control
Though still compatible with all EX-series Speedlites, the "smarter" E-TTL II system captures the subject as a "plane" and ensures that images containing various colors and levels of reflection are captured accurately and optimally. The system compares the ambient light with the reflected pre-flash off the subject reported in all 35 metering zones and selects the areas with a small difference to be weighted for flash exposure calculation.
"How ETTLII Works" on this site (http://photography-on-the.net/forum/showthread.php?t=46311&highlight=ettlii)
There's never any "full-frame" flash metering in E-TTL or E-TTL II. In both cases, with EOS cameras that use a 45-point focusing system/21-zone metering sensor, all flash metering is carried out by the 17 metering segments within the Area AF ellipse shown in the viewfinder. Subject matter outside the ellipse is completely ignored in terms of flash exposure control.
What is true?
I am sorry i am not good at speak in English!
Does 20D Flash Metering use all 35 Metering Zone??
Canon EOS 20D DSLR Preview (http://photo.net/equipment/canon/20D/eos20d_review_2.html)
Evolved E-TTL II Flash Exposure Control
Though still compatible with all EX-series Speedlites, the "smarter" E-TTL II system captures the subject as a "plane" and ensures that images containing various colors and levels of reflection are captured accurately and optimally. The system compares the ambient light with the reflected pre-flash off the subject reported in all 35 metering zones and selects the areas with a small difference to be weighted for flash exposure calculation.
"How ETTLII Works" on this site (http://photography-on-the.net/forum/showthread.php?t=46311&highlight=ettlii)
There's never any "full-frame" flash metering in E-TTL or E-TTL II. In both cases, with EOS cameras that use a 45-point focusing system/21-zone metering sensor, all flash metering is carried out by the 17 metering segments within the Area AF ellipse shown in the viewfinder. Subject matter outside the ellipse is completely ignored in terms of flash exposure control.
What is true?
I am sorry i am not good at speak in English!