Since the beginning of photography, there have been three basic elements that need to be taken into consideration when making an image; the size of the aperture on your lens, the speed of the shutter, and how sensitive your film (or, in modern times, the digital image sensor) is to light. Indeed almost all of photography boils down to an understanding of how those three variables affect the overall exposure of your image. Like death, taxes, and the morning sunrise – they are immutable and must be considered no matter the type of camera you have or the subject you are shooting.
Some photographers prefer to shoot in manual and control each of these elements individually, while others prefer the full Auto route. Still others find themselves somewhere in between by letting the camera make some decisions while they control one or two of the parameters themselves.
But at the end of the day the aperture, shutter, and ISO always work together to help you get the photos you want. Until now. Sort of…
https://digital-photography-school.com/iso-invariance-exposure-triangle/?utm_source=newsletter&utm_medium=email&utm_campaign=Apr-2017
