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... more