Hi! The following url tells how a matrix metering works but it is not quite clear to me.
http://kenrockwell.com/nikon/matrix02.htm Please note that the page will take sometime to load because it contains a jpg file of size 350KB. I am quite sure that some of the list members must have electronics engineer as background. Could you please explain what that flow chart means? Cheers, Ayash. On Tue, 9 Jul 2002, Chris Brogden wrote: > On Tue, 9 Jul 2002, P�l Jensen wrote: > > > This is plain wrong. Evaluative meter is like any other meter; it > > tries to make everything medium toned. However, the notion that center > > weighed metering "solve" the problem or has a better "hit rate" is > > plain wrong. The fact that some people prefer center weighted > > metering because they know how it react to various scenes is fine. > > Agreed up to here. > > > However, this has nothing to do with matrix metering failure but the > > photographer not having learned how matrix metering works. > > Uh... not exactly. Photographers can never learn how multipattern > metering systems work. The algorithms are extremely complex; some Nikons, > for example, have a database of tens of thousands of sample scenes that > the camera will consider when choosing an exposure. The photographer has > no idea whatsoever which of these scenes the camera will select. Matrix > metering does a good job with print film for the most part, but the point > is that the photographer, no matter how much they use it, will never be > able to know for sure how much importance the meter is attaching to each > individual segment in any given (and changing) lighting situation. At > least with CW metering you know exactly how much weight the camera gives > to the segments. > > I'm sure that, given enough time and experimentation, a photographer can > learn how their camera weights the segments in some very common lighting > conditions, but this is almost impossible to assess because of the sheer > number of segments and variety of lighting conditions. And it's only good > until you switch cameras (most of the MZ series, for example, use > different algorithms to decode the same six segments). > > chris - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
