The basic laws of imaging state that only one part of a three-dimensional object can be truly in focus at the image plane. This means areas in front of and behind the focus plane still appear more or less in focus or acceptable focus.

There’s more to black and white photography than just a lack of color. As a creative medium, traditionalists may call it “monochrome” while digital imagers prefer “grayscale” but to paraphrase Billy Joel, “it’s still black and white to me.”