How to carry on the precise metering

Metering is not for you in this camera viewfinder area of the measurement of exposure value, this process is very difficult?

The automatic metering system camera in the light even scenarios can work normally, but if the picture mainly with black and white give priority to, or light than too big, can appear to metering.

That is black, white gives priority to filming the pictures of the camera film will go wrong?

So, for example, a pure white a close-up of pet cat, you give it a close-up shot of the time there will be underexposed phenomenon. The camera's automatic metering system will default intensity of the scene for a middle value, and then use this value to measure the light of the scene is strong.

It is at this time of the aperture and shutter speed in the average light, colour diversity in the scene without a problem, but meet brunet with light color scene, can do.

Don't camera own metering system can't solve this problem?

Unfortunately, not yet. Most camera all offer three kinds of metering mode: matrix metering (average metering), central key metering and spot metering. Matrix metering is testing of each zone in the scene light, comprehensive calculation, this one of the most moderate exposure value.

The central focus metering will read the whole scene light information, but the results are more inclined to the center of the picture in the area of metering value, because in most cases, we shot of the main body are located in this area. For center-weighted average metering or spot metering is to a point for metering. Although these metering mode can be in different situations, to provide you with a more accurate choice, but they are based on the default said just the brightness of the dx, can't sensation picture of objects in the size of the glance rate.

Why do these metering system in black and white scenarios will go wrong?

We want to know, white reflective rate than black, so in the same light conditions, white to reflect in the camera to the light is stronger than black scene. The camera's default reflective rate is 18% ash card of reflective rate, the color of the reflective rate to less than white object, so that opportunity "mistake" scene is light, so will improve the shutter or contract aperture through a picture to prevent exposure. Black object shooting the same is true of, the black reflective rates lower than grey CARDS, so the camera "feel" scene light very dark, thus increasing the exposure, causing a aeration black part. Camera through the reflected light exposure value measurement of shortcomings in this.

Then what is the solution?

The most simple solution is to use for center-weighted average metering or spot metering mode, in the scene in search for reflective rate and the camera glance rate almost object standard for metering, at this time the metering value and the scene get most close to light intensity. For example in the snow, the walls of the gray film, by this time can avoid said just now, after the completion of the dx, then adjust composition, finished making.

In use, how do we do the operation?

In the spot metering, just change the metering points, and the camera will film again, so we will use the ae lock button, first to glance rate of moderation for metering object,Nikon EN-EL4 Battery and then press the button will be lock exposure parameters, and then to composition.

How do I judgment should be what places to film?

You don't need to know the color of the precise each glance rate, when photography, you can look for the middle scene is tonal, light color leaves,Nikon EN-EL3 Battery illumination even wall. If you take in the scene of various color, can choose in several in the boundary of the colour on film, so that you will get the average exposure value several color. All in all, avoid to black and white film part.

If the environment than a light, not suitable for metering objects?

The most traditional method is take a grey CARDS, will be adjusted and gray card on the body of the same light condition, to film it. If no grey CARDS,Nikon EN-EL14 Battery to the back of his film can also. After the shooting, want to observe the histogram picture, look at the exposure are accurate, if found that highlights overflow, or the darker loss, can be in this basis use exposure compensation function, fine-tuning the camera's exposure.

Isn't this kind of metering method applies only to black or white gives priority to filming the scene?

Not so, because our camera can distinguish the strength of the light panasonic Lumix DMC-FS30 Battery, can't judge the colour of objects, so using a grey CARDS measure the environment in the light of the accurate stronger than you at ordinary times the metering value more accurately. Maybe this little improvement, can present a more details and level.

Also note that must find the metering area, know what you want to film. For instance in scenery photography, we can to the sky on film, prevent had exposed to the blue sky.panasonic Lumix DMC-TZ10 Battery During the filming of the silhouette, this method is very useful. And in a close-up shot of the portrait, we will have to face film, a little background can play of the main body of the outstanding aerating action.