Canon's metering

[nitehawk]

Dear All,
I have been searching over Internet to understand how Canon's metering work - 35-zone and partial on my 30D but failed.

Does anyone out there knows or have done some testing to discover this?

Many thanks.


Trouble User,
Francis

[Bob Atkins]

35 zone metering splits the image into 35 seperate zones, then uses a proprietary algorithm to try to calculate the optimum exposure based on the illumination on each zone.

Partial metering takes the average illumination intensity in a central area of the image (9% of the total area) and uses that to calculate exposure.

Partial can sometimes give more accurate results if you have a small subject which differs greatly in brightness from the background.

Try this link - http://www.usa.canon.com/content/rebelxt_tutorial/rebelxtlessons.htm and look at lesson #3