Bokeh Effect in Photography: A Guide to Gorgeous Background Blur
Briefly

Bokeh in photography enhances main subjects by blurring background areas, creating distinct rounded shapes that add artistry and depth, commonly used in various photography genres.
The bokeh quality in an image is affected by five crucial factors: aperture size, lens choice, distances between camera-subject and subject-background, and the background's quality.
Good bokeh features smooth and pleasing out-of-focus areas, while bad bokeh results in overly detailed or jagged backgrounds that detract from the subject.
Mastering bokeh involves understanding both the technical aspects and the artistic implications, allowing photographers to create profoundly beautiful and striking compositions.
Read at Digital Photography School
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