How to use ISO effectively?

ISO directly connected to the light available and the brightness or exposure of the image

ISO numbers denote the light responding capacity of the image sensor in a given situation. Higher the ISO the image sensor responds effectively even in light conditions and forms a bright image.

Higher ISOs result in noisy images and these digital noise is noticeable when we enlarge the picture and print them. On the other hand, low ISO settings will give good quality images without digital noise. Images for professional applications are shot using low ISO.

Low light needs a higher ISO settings like, 800,1600, 3200..an so on

Bright light needs a lower ISO setting like, 100 and 200


Higher ISO settings are generally used in relatively dark indoors.


Lower ISO settings are generally used in relatively bright out-doors.


We can also use, higher ISOs when we are using faster shutter speed to freeze fast moving subjects


We can also use Higher ISOs when we are using aperture like f/16, f/11 for greater depth of field.

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Our viewer shares his thoughts on the video by KLR the photo guru YouTube channel

Steve Mellor Photo Vlogger: You know, ISO is often the thing that gets left out of the exposure triangle. We’re constantly talking about shutter speed and aperture but I’ve seen a lot of photographers really rely on those higher ISO settings to get their shots. That said, from my experience, I wouldn’t go higher than 6400 on the cameras I’ve used, unless shooting Astrophotography. But, this is a really important subject that people need to know if they’re starting out or if they’re moving from traditional film to digital (of course, that is less likely now but does still happen).

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