whats the difference between spot metering and evaluative , i just con't get it.
brantfordbandit Senior Member  504 posts Joined Sep 2006 More info | Mar 27, 2007 19:20 | #1 whats the difference between spot metering and evaluative , i just con't get it. canonguy
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Aray_Of_Art Senior Member  316 posts Joined Jul 2006 Location: Midwest, USA More info | Mar 27, 2007 20:16 | #2 Evaluative means the light meter is checking light from all that it is looking at and giving even importance to the whole frame. 30D, 24-70mm f/2.8L, 100mm f/2.8, 85mm f/1.8, 50mm f/1.4, 430EX Speedlite
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mishnogram Senior Member  264 posts Joined Nov 2006 Location: Ontario Canada More info | Mar 28, 2007 06:57 | #3 Aray_Of_Art wrote in post #2941437  Evaluative means the light meter is checking light from all that it is looking at and giving even importance to the whole frame. Spot metering means that it meters just for the "spot" you point it at. So if you meter for a bright spot the rest of the image will be darker. Or meter for a dark spot the rest of the image will be lighter. That is one of the best answers I've read regarding the metering question, thanks. Min
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Jon Cream of the Crop  69,628 posts Likes: 227 Joined Jun 2004 Location: Bethesda, MD USA More info | Mar 28, 2007 08:54 | #4 Actually, Evaluative metering "looks" at the scene as a number of separate "zones" and decides (evaluates) based on a database Canon has stored in the camera, what the scene most closely resembles and therefore what would be the best exposure to use. This means that if it sees, for instance, a large dark object somewhat off-center but not way off at the edge, it'll consider it more important than one that was at the edge. If the light pattern it sees looks like a portrait, it'll expose for the face; if it looks like a landscape, it'll expose for the land rather than the sky and so on. If it gave even weight to the whole screen (which few, if any, cameras do these days) a large dark object that was almost out of the picture would force the camera to open up, giving you an overexposed center. The commonest alternative to Spot/Partial metering or Evaluative (or whatever a given camera maker may call it; Eval is just Canon's name) is CWA, center-weighted averaging, which figures you've centered your subject and that's most important. Jon
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Aray_Of_Art Senior Member 316 posts Joined Jul 2006 Location: Midwest, USA More info | Mar 28, 2007 13:20 | #5 mishnogram wrote in post #2943321 That is one of the best answers I've read regarding the metering question, thanks. You're welcome, but I guess I wasn't accurate enough. 30D, 24-70mm f/2.8L, 100mm f/2.8, 85mm f/1.8, 50mm f/1.4, 430EX Speedlite
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