Exposure compensation
Exposure compensation (EV) feature in digital cameras allows to adjust the light measured by the light meter or in simple language, it allows to increase or decrease the amount of light entering the camera by adjusting aperture and shutter speed.
Exposure compensation(EV) is end-result of manual adjustment of aperture and shutter speed. If you increase or decrease EV value, it will automatically adjust aperture and shutter speed and you don't need to deal with aperture and shutter speed individually. If you are adjusting aperture and shutter speed individually, there is no need to adjust EV value otherwise your aperture or shutter speed will be changed accordingly.
Generally EV values are from -2 to +2.
Negative EV value means less amount of light entering camera (underexposed image) and positive EV value means more amount of light entering camera(overexposed image).
Photo by samfeinstein
The above image shows the effect of exposure compensation and White Balance.
How it is different from ISO
Exposure compensation and ISO are two totally different things.
Many of camera users think that ISO also controls the amount of light entering camera and exposure compensation also does that. But it is not so.
Exposure compensation (EV) feature in digital cameras allows to adjust the light measured by the light meter or in simple language, it allows to increase or decrease the amount of light entering the camera by adjusting aperture and shutter speed.
Exposure compensation(EV) is end-result of manual adjustment of aperture and shutter speed. If you increase or decrease EV value, it will automatically adjust aperture and shutter speed and you don't need to deal with aperture and shutter speed individually. If you are adjusting aperture and shutter speed individually, there is no need to adjust EV value otherwise your aperture or shutter speed will be changed accordingly.
Generally EV values are from -2 to +2.
Negative EV value means less amount of light entering camera (underexposed image) and positive EV value means more amount of light entering camera(overexposed image).
Photo by samfeinstein
The above image shows the effect of exposure compensation and White Balance.
How it is different from ISO
Exposure compensation and ISO are two totally different things.
Many of camera users think that ISO also controls the amount of light entering camera and exposure compensation also does that. But it is not so.
- ISO only changes the sensitivity of sensor and does not effect the amount of light entering the camera but on the other hand, exposure compensation increases or decreases the amount of light entering the camera by changing aperture and shutter speed.
- ISO, shutter speed and aperture can be adjusted individually but it is not so with exposure compensation.If you change any of them (aperture and shutter speed), EV value will automatically be changed.
- EV value depends upon the aperture and shutter speed whereas ISO value does not.
- In most cases, increasing the ISO value introduces more noise in the image whereas increasing or decreasing EV value only leads to slight underexposed or overexposed image which can be easily corrected using image editors such as Adobe Photoshop.
Post a Comment