Why metering in camera




















The rest of the scene may not be correct, leaving that up to you to work out. Notice that the white fur on the dog looks much softer and less highlighted. Even though this is pleasant to look at, it leaves the rest of the scene underexposed. Be careful when using this metering mode. Some newer Nikon cameras have highlight-weighted metering as an option.

It is almost the same as spot metering. But unlike spot metering, here, the camera recognises the highlights even in motion. This prevents the whites on your photo from blowing out. It is the most useful when photographing moving, highlighted subjects, such as a white car.

The centre-weighted mode is a halfway between matrix and partial metering. It measures the exposure of a pretty big metering spot in the viewfinder of the camera. Most people take photographs in which the subject is in the metering centre of the image.

DSLR camera manufacturers realised this. They needed to include an effective centre-weighted metering system in the camera.

This way, photographers can reach an accurate exposure value. This results in darker, less visible background and surroundings. For this reason, centre-weighted metering can add a special atmosphere to your photos.

The outcome of centre-weighted metering can be hard to predict in digital photography. You always have to look into the viewfinder and consider how much detail do you need to keep in the corners. This works in a similar way to matrix metering in photography. The camera looks at the light from the whole scene.

But it does so in a very unintelligent way. This often results in over and underexposed areas in the same image. You should have a pretty good understanding of what metering modes do and when to use them by now. I find matrix to be pretty good at working out what I want in the majority of situations. For me, it would be pointless to switch to centre-weighted metering. It gives me more control over the light and dark parts of the scene.

There are cases where the dynamic range of the photo is very small. This means, that there are no strong shadows or highlights. I leave my camera with matrix mode on for shots like this. Metering is used to measure the brightness of the subject.

The camera optimizes exposure by adjusting shutter speed, aperture f-number , and ISO sensitivity according to the brightness of the subject, which is measured using the camera's built-in metering sensor.

The camera does not simply measure the overall brightness of the frame, but measures brightness separately in multiple areas of the frame.

The metering mode determines which areas of the frame are used by the camera to measure subject brightness and how the camera sets exposure. Normally the camera uses matrix metering, in which it divides a wide area of the frame into multiple segments and sets exposure based on a variety of information, including subject brightness and color.

You can also choose center-weighted metering in which the camera assigns the greatest weight to the center of the frame and spot metering in which the camera meters the area around the selected focus point. Choosing a metering method according to the scene and your creative intent allows you to achieve results that better mirror your artistic vision.

It still reads from a large proportion of the frame, just not the whole thing. An accordion player in Central Vienna — Austria. The area inside the red circle is roughly what will be metered with Center-Weighted mode. I would not have used Evaluative Metering mode for this scene because my camera would have tried to brighten the image — seeing it is mostly dark.

Whereas, I intentionally wanted more of a silhouette-like feel. The area inside the circle is roughly the percentage of the frame that will be metered when using Center-Weighted mode. If Center-Weighted metering meant zooming in a little, Partial Metering is a huge jump inwards again. Boatman on the Ganges — Varanasi, India. Partial Metering mode is where things start to get really interesting. You begin taking more control than ever before of where you meter from in the scene.

With the Varanasi boatman above, I was shooting in Aperture Priority mode. I aimed my center focus point at his face before composing the shot. Note that this is for use mainly with Aperture or Shutter Priority mode.

With this button held down, you lock in the exposure and can recompose the shot without the settings changing. On the same boat ride, the sun sets over the ghats — Varanasi, India. Again, I aimed my center focus point at the flowers to meter. I personally use Spot Metering mode more than any other, but it may be more challenging for you if you are just learning about your camera and metering.

It is particularly useful to use spot metering in conjunction with the exposure lock button and the center AF point selected.



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