> Date: Wed, 09 May 2001 23:12:33 -0400 > From: "Mr. Bill" <[EMAIL PROTECTED]> > Subject: Re: EOS Evaluative metering versus center-weighted > > First there were averaging meters, they gave equal > emphasis to every part of the frame. They were very > susceptible to giving poor exposure in backlit and > other non-even lighting situations. Right, but you always knew exactly what the camera did and why. No hidden tricks. > Then came center-weighted meters. The gave much > more emphasis to the center of the frame and very > little to the edges and corners. They were considered > a HUGE advance over the averaging meter for most situations. For untrained newbies and AE modes, that is. In manual mode the exact characteristics do make a strong difference, and without precise documentation may lead to misjudgings. > Evaluative metering can vary the emphasis on different > parts of the frame depending on what the meter sees. And depending on what it is programmed to think. > A set of parameters is stored in the cameras > memory to make these decisions. But nobody can say what the camera will do in a given situation. You only find out after the shot. > For example, the top two segments see much more > light than the bottom two. The camera assumes > that this is a landscape (top two segments see sky) > and changes the emphasis to pay more attention to > the bottom two segments. This is a simple example, > but a good one. Yes, and if the top two segments are the edge of a table from precious wood with the darker part being the shade from the table, the camera f***s up when you try to take a picture of the wood structure with the table edge at the top of the frame. I prefer to decide for myself if I want my table to turn into bright sky. Simple example, but as you say: A good one. > The more segments, the more patterns that can > be saved. The more segments, the more lottery. > This is the current state of the art, with more > segments/patterns being assumed as better. Unfortunately, yes. > One advantage to having more segments is that the > metering can be weighted on the focusing point so > that you don't even need to reposition the camera > to meter. And the disadvantage of this are the horrifying results from the D30 flash pictures, using exactly this scheme. > Date: Wed, 09 May 2001 23:22:33 -0400 > From: "Mr. Bill" <[EMAIL PROTECTED]> > Subject: Re: Canon EOS-3DV > > CreoScitex has announced a 6 megapixel > 24mm x 36mm CMOS (C-MOST) That is not developped or made by CreoScitex, it was in the portfolio of CreoScitex, but engineered by a contractor. A sign of failure is that this contractor did not mention the C-most on worlds most important exhibition for sensors in Munich, Germany. They had lots of press material before, but suddenly nothing anymore. > I don't believe any cameras have been sold yet, > based around the C-MOST chip. And I think none will ever. -- Michael Quack <[EMAIL PROTECTED]> http://www.photoquack.de * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
