Bokeh is a photography term that’s a bit difficult ... or “subject isolation”, achieving it optically requires a fast lens with an aperture below 2.8 or preferably lower.

At the heart ... lens is made up of 15 elements in 10 groups, including 5 ED, 3 high-refractive, and 2 ultra-aspherical elements. This design tackles chromatic aberration and “onion-ring ...