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Old Jul 4, 2002, 12:36 AM   #1
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Default What's the difference between center weighted and multipoin

metering. Could you give some examples wat to use when?


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Old Jul 4, 2002, 12:51 AM   #2
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Multi-point metering is about the same as what most cameras call matrix. The exposure is based on many points throughout the frame and tries to give you the best possible exposure for the subject material in the entire frame.

Center-weighted averaging also uses the matrix or multi-point calculations but it gives the most "weight" to the center of the frame. This is good for those times when lets say you are shooting a subject that has fairly strong backlighting but you want the central subject to be exposed the best. A building against a bright sky, the building is properly metered and the sky will probably over-expose to some degree.

Spot metering is even more precise for a central-frame object that is surrounded by much brighter or darker lighting.

See our <a href="http://www.steves-digicams.com/digi_dictionary.html">Digicam Dictionary</a> for lots of good photographic and digicam terms and definitions.

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Old Jul 6, 2002, 9:34 AM   #3
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You may also have come across the term "Multimetering," which is different. Some digicams such as the Oly C2100 give you the possibility
of measuring a scene at several points and having the camera figure out the average of the light levels.
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Old Jul 8, 2002, 5:29 PM   #4
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In practical terms, I've never noticed a difference in the end results.
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Old Jul 8, 2002, 6:24 PM   #5
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Default There is a difference...

Even though the Spot setting on the D60 goes by the name Partial Metering, and is about 5X bigger than the spots in Coolpix cameras,
there is still a very big difference. However, the way the D60 works, as well as many other cameras, you point the center circle at the part of your subject you want toexpose for. Then, you have to press the "*" button, which locks the exposure in. You can then recompose, if you choose.

If you don't press the "*" button, the area that will be metered will shift as you shift the camera to recompose.

To try the partial exposure (spot), take a shot of trees sillhouetted against a bright sky. If you use multiexposure (matrix, evaluative, etc) the tree will come out dark. If you use spot exposure and point the exposure target at the dark part of the trees and push the explosure-lock button, then recompose the shot, you will see that the tree is properly exposed but the sky is blown out. One easy way to use this is to find a area that is partly bright, partly dark and try to put the "spot" on it so it represents an average of the light. Then push the exposure lock.

The difference between evaluative and centerweighted is more subtle on the D60, but it is there.

[Edited on 7-8-2002 by WalterK]
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