焦しょう点てん深しん度ど

noun

depth of focus

Technical term in optics and photography; refers to the range in front of and behind the focal plane where the image appears acceptably sharp.

• このレンズは焦しょう点てん深しん度どが浅あさいので、ピント合あわせが難むずかしい。

  This lens has a shallow depth of focus, so focusing is difficult.