ISO denotes is how sensitive the image sensor is to the amount of light present. The higher the ISO, the more sensitive the image sensor and therefore the possibility to take pictures in low-light situations.
ISO speed affects the shutter speed / aperture combinations we can use to obtain correct exposure.
Suppose our digital camera's light meter warns us there is not enough light to correctly expose a scene. We could use the on-board flash, but let's suppose again it's not allowed.
We would then need to use a higher ISO. Set on "ISO Auto" mode, Our digital camera will automatically select a higher ISO. Otherwise, We can manually select the next higher ISO and see if the increased sensitivity allows us to obtain a correctly exposed picture. If it does, we can now take a correctly exposed picture.
However, all this increase in sensitivity does not come free. There is a price to pay with our image appearing more noisy.
General Rules and tips for ISO Settings:
- Use an ISO of 100 or 200 when taking photographs outside in sunny conditions.
- If the sky is overcast or it is evening time, then use an ISO within the range of 400 to 800.
- Night time or in cases of low light you might need to set your digital camera ISO to 1600. If we don't then our photo will appear too dark if at all.
(Self Review)
ISO is the measurement of the camera sensor's sensitivity to light. We will get the same effect of ISO either we used longer shutter speed or larger aperture opening.
If we are using high ISO value means the sensor will be more sensitive to light, meaning it will take less light to get the right exposure. Then, If we are using low ISO indicates low sensitivity to light but generally higher resolution with less noise or grain.
When taking photograph outside or in sunny condition, we can used ISO of 100 or 200. When taking in a darkened room or if the sky is overcast or in the evening time, we can used ISO 400 to 800.
No comments:
Post a Comment