“This is the message we have heard from him and declare to you: God is light; in him there is no darkness at all.” 1 John 1:5 don’t want to start preaching, but just like God we want you to understand how important both natural and artificial light is in photography. To create an image both on film or digital, there needs to be a light sorce. Without any light there is no way to create an image, therefore in photography terms, Light = God.

The 3 main factors that effect the the outcome of a image and how the camera reacts to light, is aperture, shutter speed and ISO. The three photography terms can be defined by the following:

Aperture is a hole or an opening through which light is admitted. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.

Shutter Speed is a common term used to discuss exposure time, the effective amount of time a shutter is open to allow expose an image.

ISO is the sensitivity of the camera sensor to light, the higher the ISO the more light that the camera sensor can read.

The three are in perfect balance, if you change one it effects the others and vice versa. so, you can’t just focus on one principle, like the “aperture” is what makes a good image. It’s a combination of all three that make a good exposure.

We will not go over in detail how each setting will effect another setting in reference
to another. For now we want to convey the importance of how each setting effects the exposure of how an image will turn out.

Mahalo for reading, happy shooting!

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