Now I’ve tried to simplify these definitions but that is no easy task. Whole books are written in great detail about these terms. However, for now I am going to concentrate on remembering that all three of these directly relate to each other and work together to enable a photographer to capture images in creative ways. That said, I need to get lots of practice using different settings in each feature so I can begin to understand their relationships and power.
Next I am going to post about the different shooting modes.
The aperture controls how wide the iris of the lens will open when you take a photo. A smaller f/number means a larger aperture opening, and the smaller fractions represent faster shutter speeds. These are called f-stops and an f-stop is a fraction that gives you the diameter of the aperture. The f stands for the focal length of the lens and the slash means divided by, and the number represents the stop in use. The aperture is a hole that lets light into the camera. You, the photographer can control how much light you let in. The aperture also affects the sharpness of your image. This is where depth of field comes into play. You decide just what you want in focus- everything or just one part of the image.