noun
bokeh; out-of-focus quality; blur aesthetic
Photography term referring to the aesthetic quality of the out-of-focus areas in an image, especially the character of the blur.
See also: ぼけ
このレンズはボケ味がとても美しい。
This lens produces very beautiful bokeh.
ポートレートでは背景のボケ味が重要だ。
In portraits, the quality of the background blur is important.
ぼけ is the noun meaning 'blur' or 'out-of-focus state'; ボケ味 specifically refers to the qualitative character or aesthetic of that blur.
Compound of ぼけ (blur, out-of-focus) + 味 (flavor, quality). The term 'bokeh' in English is derived from this Japanese word.