By Evaluate bokeh quality by shooting test scenes with points of light against dark backgrounds—Christmas lights, streetlamps at dusk, or sunlight filtering through leaves work perfectly. The out-of-focus highlights will reveal your lens’s bokeh character immediately: smooth, circular discs indicate pleasing bokeh, while harsh edges, onion rings, or cat’s-eye shapes suggest optical compromises that can distract in portraits and shallow depth-of-field work.
Study the transition zone between sharp and blurred areas next. Quality bokeh creates gradual, creamy transitions rather than abrupt shifts that draw attention away …
