Petzval lenses, for example, use a control ring to enhance or reduce the swirling bokeh effect. There’s a reason that most lenses don’t have such a control ring, however. Convergence is the ...

It's sometimes referred to as the 'bokeh panorama' or 'bokeh-rama', owing ... will still produce a suitably blurry background for this effect. As you'll be merging photos, each image needs to ...