Here, we introduce and explore the some of the basic technical terms related to photography.
Each shutter is equipped with another device to control light striking your sensor during exposure. This device is a diaphragm with an adjustable opening called aperture. The diaphragm is constructed of overlapping leaves that open and close like a leaf shutter. Like the shutter, the diaphragm adjusts light in a twice/half relationship in a series of standard numbers called f numbers. Each f –number has a half/twice relationship with the numbers on either side of it, as with the shutter speeds. The formula for this is,