The short version
- The meter assumes the world averages to middle gray, which is why snow turns gray and black cats turn gray.
- Evaluative (matrix) metering suits most scenes and is the best default.
- Center-weighted favors the middle of the frame: good for classic portraits.
- Spot meters a tiny area: best for backlit subjects and high-contrast scenes.
- When the meter gets fooled, fix it with exposure compensation, not a different mode.
Last updated · Exposure Triangle Simulator editorial team · How we test
How the camera meter thinks
Your camera has no idea whether it is looking at snow or coal. Its meter measures the brightness of the scene and aims for middle gray, the average tone of the world. Point it at a white snowy field and it darkens the exposure until the snow looks gray. Point it at a black dog and it brightens until the dog looks gray.
Every exposure surprise you have ever had comes from this one assumption. Metering modes just change which part of the scene the camera averages. Learn them together with the exposure triangle and the camera stops feeling random.
Evaluative / matrix metering
The camera divides the frame into zones, measures each one, and runs the results through a database of thousands of scene patterns. It recognizes skies, faces and backlighting, and biases the exposure accordingly.
This is the smartest mode and the right default for nearly everything: landscapes, street, travel, general shooting. Modern evaluative metering is genuinely good. Leave it on until you have a specific reason to change.
Center-weighted metering
The classic mode from the film era. It averages the whole frame but gives roughly 60 to 80 percent of the weight to a circle in the center, ignoring the edges.
Use it for straightforward portraits where the face is centered and the background brightness might confuse evaluative metering. It is predictable: whatever is in the middle drives the exposure, no scene database second-guessing you.
Spot metering
Spot reads only a tiny circle, usually 1 to 5 percent of the frame, centered on your focus point or the frame center. Everything outside the spot is ignored completely.
This is the precision tool. Backlit portrait: spot meter on the face and the face exposes correctly while the background blows out beautifully. Concerts and stage performances: spot on the performer and the dark hall stops fooling the meter. The trade-off is that if the spot lands on the wrong tone, the whole exposure is wrong, so it demands attention.
Which metering mode to use when
| Scene | Best mode | Why |
|---|---|---|
| General, landscapes, travel | Evaluative | Smartest guess across the whole frame |
| Centered portraits | Center-weighted | Face drives exposure, edges ignored |
| Backlit subjects | Spot on subject | Subject exposed right, background allowed to blow out |
| Snow, beach, white interiors | Evaluative + positive compensation | Mode matters less than adding +1 to +2 EV |
| Stage, concerts | Spot on performer | Dark surroundings stop dragging exposure up |
Notice the pattern: the mode gets you close, and exposure compensation finishes the job. Metering chooses what to measure; compensation corrects the meter's gray-world assumption.
Practical metering tips
- Leave evaluative on as your default. Change modes for a reason, not out of habit.
- Check the histogram after tricky shots. It shows what the meter actually delivered.
- For snow or beach scenes, dial in +1 to +2 stops of exposure compensation before you even look at the screen.
- In manual mode, the meter becomes an advisor, not a decider. Center the needle, then adjust to taste.
- Link spot metering to your focus point if your camera allows it, so metering follows your subject.
Get the printable camera settings cheat sheet
Two pages for your camera bag: starter settings for portraits, landscapes, sports and night shots, the handheld shutter speed rule, and the five settings rules worth memorizing.
Frequently asked questions
Why is my photo too dark when shooting against a bright sky?
The meter averaged the bright sky with your subject and exposed for the sky. Use spot metering on your subject, or add positive exposure compensation, so the subject is exposed correctly.
Why are my snow photos gray instead of white?
The meter assumes the world is middle gray, so it darkens bright snow until it looks gray. Add +1 to +2 stops of exposure compensation to make snow white again.
Which metering mode is best for portraits?
Center-weighted for simple centered portraits, or spot metering on the face for backlit or high-contrast portraits. Evaluative with face detection also works well on modern cameras.
What does spot metering actually do?
It measures light from a tiny area, usually 1 to 5 percent of the frame, and ignores everything else. It is the most precise mode but also the easiest to get wrong if the spot lands on an unusually bright or dark tone.
Why does my camera overexpose backlit photos?
It is not overexposing, it is exposing for the bright background while your subject goes dark. The fix is spot metering on the subject or positive exposure compensation, or adding fill flash.