Darren Smith Photography's photographic tutorials are aimed to teach anyone interested in photography the basics in how to operate their camera and what to consider when you move beyond taking "snaps".
This video is all about camera ISO and how it affects your photographs.
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Hello and welcome to the Darren Smith photography tutorials.
This video is all about camera ISO and how it affects your pictures
ISO is a number used to express the light sensitivity of the camera in digital photography. ISO settings can be adjusted far more easily as you can see here the amount of light recorded changes dramatically, when the ISO is increased on a traditional film camera the ISO is set by the film and if you want to adjust the sensitivity you have to change the type of film you use a higher ISO allows you to shoot photographs in lower light conditions with the same aperture and shutter speed.
There is however a trade-off as higher ISO photographs are more susceptible to noise which may spoil the image as you can see here the two images are shot using different ISO levels the image with a high ISO is very grainy and noisy the other is shot as a lower ISO and there's a lot less noise visible. It does however mean that the shutter speed is a lot slower traditionally the camera had four settings to obtain the correct exposure these are fully automatic, where the camera control the aperture and shutter speed should the priority where the camera had a fixed shutter speed and the aperture is controlled automatically, aperture priority with a camera controlled the shutter speed when the aperture is fixed and full manual where the photographer has full control over their settings with modern camera sensors we can make use of another setting and that is auto ISO
This is where the camera can have an aperture and shutter speed set by the photographer and the sensitivity of the sensor can be changed automatically to get the correct exposure, this means that the photographer has a new way to control their own creativity and how their image looks.
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