F-stop is a term used in photography to denote aperture measurements on a camera lens. The aperture controls the amount of light that enters the camera lens and is measured in f-stops. F-stop is also known as the f-number, and it is the ratio of the lens focal length to the diameter of the entrance pupil. The f-stop value determines how much light is allowed to enter the camera lens on a given photograph.

The f-stop series is universal to all cameras and is a series of stopping points that are called f-stops. Each consecutive f-stop halves the opening of the previous one. For example, an 80mm lens with its f-stop set to f8 means that the optics inside the lens create a diameter equivalent to 10mm. Changing the f-stop to f16 creates a diameter of 5mm.

F-stop is one of the three fundamental components that make up the exposure triangle in photography, along with shutter speed and ISO. The f-stop setting helps establish the look and feel of a photo by determining the depth of field. A wider aperture (lower f-stop number) creates a shallow depth of field, while a smaller aperture (higher f-stop number) creates a deeper depth of field.

To control the f-stop, one can use the aperture priority mode or manual mode on the camera. In aperture priority mode, the camera adjusts the shutter speed to keep the exposure consistent between frames. In manual mode, the photographer has more control over each element of the photograph.

In summary, f-stop is a term used in photography to denote aperture measurements on a camera lens. It controls the amount of light that enters the camera lens and is measured in f-stops. The f-stop setting helps establish the look and feel of a photo by determining the depth of field. To control the f-stop, one can use the aperture priority mode or manual mode on the camera.