Bokeh is a term used to describe the aesthetic quality of the blur in a photograph. It is derived from the Japanese word «boke,» which means «blur» or «haze.»
In photography, bokeh refers to the way the out-of-focus areas of an image look, particularly the areas that are beyond the depth of field. The depth of field is the range of distances in a photograph that appears to be in sharp focus. When an object or subject is in focus, and the background is out of focus, the bokeh of the photograph is often used to draw attention to the subject and make it stand out.
Bokeh is often associated with lenses that have a wide aperture, which allows more light to enter the camera and results in a shallow depth of field. Lenses with a wide aperture, such as f/2.8 or f/1.4, are often used to create bokeh in portrait photography, for example.
There are a number of factors that can affect the bokeh of a photograph, such as the aperture of the lens, the distance between the camera and the subject, and the distance between the subject and the background. By controlling these factors, photographers can create images with beautiful, soft, and smooth bokeh.