Matrix metering, also called evaluative or multi-zone, reads the whole frame and compares it to patterns the camera knows. Spot metering reads only a tiny area, usually a few percent of the frame, and ignores the rest. Matrix is a reliable default, while spot gives exact control when one part of the scene matters most.
How Matrix Metering Works
The camera divides the scene into zones, measures brightness in each, and weighs them using built-in logic. Many systems also consider focus point, colour and subject distance. The result is a balanced exposure for ordinary scenes with an even mix of light and shadow, which is why it suits quick snapshots, travel and general use.
Matrix can be fooled by strong contrast, such as a dark figure against a bright window, or a white subject that fills the frame. In those cases the camera may under- or overexpose the part you care about.
How Spot Metering Works
The camera measures light only at a small circle, often at the centre or linked to the focus point. It then sets an exposure that makes that spot a middle tone. Everything else may become very bright or very dark, which is sometimes exactly what you want.
- Backlit portrait: meter on the face so it looks natural, even if the sky clips to white.
- Stage performer under a spotlight: meter the performer to avoid a washed-out result.
- Moon against a dark sky: meter the moon so surface detail remains visible.
- High-contrast landscape: meter a key highlight or shadow to protect it.
Quick Comparison
| Factor | Matrix | Spot |
|---|---|---|
| Area measured | Whole frame | Small spot |
| Ease of use | Very easy | Needs thought |
| Best for | General scenes | High contrast, tricky lighting |
| Risk | Misjudges extreme scenes | Wrong spot gives wrong result |
Reading the Histogram
The histogram is a graph of tones in your picture, with shadows on the left and highlights on the right. If the graph is piled against the right edge, bright areas may be clipped and have lost detail. If it is pressed against the left, shadows may be crushed. Checking it after your first frame tells you whether the meter did what you expected, and shows which way to adjust compensation.
A Simple Routine
- Begin with matrix in ordinary light and check the histogram.
- If your subject looks too dark or too bright, adjust exposure compensation.
- If the scene is extreme, switch to spot and place the point on the area that must look right.
- Use an exposure lock button if you need to recompose after measuring.
- Return to matrix afterward so you do not forget the setting.
FAQ
What about centre-weighted metering?
It is a middle option that favours the centre of the frame but still reads the surroundings. Some photographers like its predictable behaviour.
Does spot metering change focus?
No. Metering and focus are separate, although some cameras can link the spot to the focus point. Check your camera’s guide for that setting.
The Short Version
Use matrix for most everyday photography. Use spot when light is extreme and one area must be exposed correctly. Learning both, plus exposure compensation, covers nearly every lighting problem.
