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Title: Canon's metering Post by: nitehawk on June 13, 2008, 07:59:04 PM 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 Title: Re: Canon's metering Post by: Bob Atkins on June 13, 2008, 09:34:30 PM 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 |