Indicators of exposure is an essential part of the camera, vital in understanding and using any exposure modes: either manual, aperture priority and shutter priority. For beginners, understanding the exposure indicator is the bridge that helps auto exposure across the world to use manual exposure and other creative techniques. This indicator can we analogy with existing speedometer in a car or motorcycle dashboard.
For what Exposure Indicator

At the core indicators of exposure is a marker of how much exposure you are taking. If you can remember the basic theory of the triangular exposure and exposure, exposure is the result of a combination of three things: setting aperture - shutter speed - ISO. And the exposure value is determined by how we measure the value of a light-dark subject, read the back of metering.

Position Indicator Exposure

In Canon DSLR cameras, expsoure indicator looks like this:

In Nikon DSLR camera, exposure indicator looks like this:
While on average the other DSLR, exposure indicator will look like this:
If we look at the top of the LCD panel a DSLR camera, the position indicator expsoure something like this
How to Read Indicators of Exposure

Exposure indicator reading is no different than reading the scale in the scales or scale temperature a thermometer. In the picture above, we take the example of a Canon camera exposure indicators: current marker at the number 0 then it means we are at the neutral point (properly exposed), while in figure -1 means 1 stop underexposed, while in figure 2 the 2 stop overexposed. Minus sign (-) means under, while a positive (non-marking) means over.

Practicing With Mode Manual Exposure Indicators

There are several ways in which we can train the understanding and use indicators of exposure, one of which is in a way like this:

     Set the camera in position mode Manual Exposure (M)
     Set ISO at position 200 (or any number but not too high)
     Push the shutter release button halfway to instruct the camera do the metering
     Point the camera to a dark subject, see the position of the pointer on the indicator of exposure
     Now point the camera to the subject of light, re-look at the position of the pointer on the exposure indicator

After understanding the exposure indicator, which can be done now is to implement it in manual mode. To shift the position of the indicators you can use exposure compensation and or change the exposure settings constituent element triangle: aperture - shutter speed - ISO. One thing to note: we do not have to always strive to be the indicator is in position 0 (zero which means properly exposed), all depending on the lighting conditions, metering techniques that we use and of course the visual touches we want to accomplish.

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