EOS Re: Fill flash & metering

[Henry Posner/B&H Photo-Video]

At 01:42 PM 05/16/2001, you wrote:
>Ok, this may be a naive question, but E-TTL measures reflected light
>intensity - given the inverse square law, doesn't that amount to
>distance information?

Nope. A white dress from 20' will reflect the same as a black tux from 8'.
And, Nikon's matrix "D" technology transmitting distance info from lens to 
exposure system is used at least as much in non-flash metering as in flash 
metering.
Read http://web.mit.edu/cai/www/nikon/metering.html and 
http://web.mit.edu/cai/www/nikon/3dfill.html
--
regards,
Henry Posner
Director of Sales and Training
B&H Photo-Video, and Pro-Audio Inc.
http://www.bhphotovideo.com

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