DSLR Camera ISO Explained [Exposure Triangle]
ISO controls exposure in your dslr camera, as well as noise and grain. This is part of the exposure triangle in photography and video when shooting on a dslr camera.

In this YouTTube video I explain DSLR ISO and how it applies to DSLR Photography and Video and show you a few examples.

ISO is part of the Exposure Triangle along with Aperture and Shutter Speed. ISO effects your camera’s sensitivity to light, but also the amount of Noise/Grain in an image.

The lower the ISO Number, the less sensitivity it has to light and the less grain it will have. This is why you will shoot with a lower ISO when using Flash, or shooting in Daylight or wit Studio Lighting conditions.

Wen shooting in lowlight situations, such as indoors or at night, you will need a higher ISO range to get the shot, and to be able to auto focus properly.

You can compensate and not go to higher ISO in low light situations by shooting with a wider Aperture, or if you’re using a tripod or monopod for stabilization you can use a slower shutter speed. You can also use the dragging the shutter technique and use a slower shutter speed while using a Flash.

Is you are shooting at a low ISO in daylight and the image is still over Exposed and you cannot compensate by adjusting your shutter speed or aperture, due to the look of the shot you want, you can use an ND Filter in order to remove several stops of light and get the shot you need.

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