How should I use center-weighted metering on a Nikon FM3a when I want precise exposure?
Asked 3/15/2016
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I’m using a Nikon FM3a, which only has center-weighted metering. I’m comfortable with the Zone System and with spot metering, but I’m unsure how to work accurately with center-weighted metering because I can’t tell exactly how much influence the outer parts of the frame have on the reading.
For example, if I meter a shadow or a tree trunk by placing it in the center area, the reading still changes depending on what bright or dark elements are near the edges of the frame. That makes it hard to know how reliable the reading is, especially for transparency film where exposure latitude is small.
What’s the best practical way to meter accurately with a center-weighted-only camera if I want more precise control?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
10y ago
2 Answers
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For the level of control you desire with a camera that only offers center weighted average metering and no instant histogram on the non-existent LCD that is not on the back of the camera, you're going to need to go the route of a handheld light meter.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
10y ago
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Generated from our catalog & community — verify before relying on it.
If you want spot-meter-like precision, center-weighted metering won’t give it consistently. It averages the scene with emphasis toward the center, so bright or dark areas near the edges can still affect the reading.
For the level of control you’re describing—especially if you want to place tones deliberately or expose slide film accurately—the practical solution is to use a handheld meter. A handheld spot meter or incident meter lets you measure exactly what you intend, without the ambiguity of the camera’s center-weighted pattern.
In short: center-weighted metering is workable for general use, but if you need precise, repeatable exposure decisions, use an external handheld light meter.
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