On Jan 28, 2004, at 5:21 PM, Karen Nakamura wrote:
Yes, it's too bad that the Canon flashes don't use the lens distance calculations. They could work on a simple internally calculated aperture based on the guide number. Then you wouldn't have to worry about the reflectivity of your subject at all.
Nikon apparently has a patent on this with their 3D metering. :-( We just have to wait another 10 years or so until the patent expires.
Well. Funny we should be talking about this:
EOS 1D Mark II features Canon's new E-TTL II flash system to optimise flash exposures, particularly with moving or off-centre subjects. Based on a new flash algorithm, it links distance information from the camera/lens system to the 21-zone evaluative or averaged metering readings from the pre-flash. Areas with abnormally high levels from reflections are ignored for flash calculation, thus greatly reducing the possibility for errors caused by subject reflection.
http://www.dpreview.com/news/0401/04012904canoneos1dmkii.asp
This latter part should be of great interest of current EOS DSLR owners.
- NK Guy
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