Macro Monday Depth of Field

The latest assignment in the yarnography group on Ravelry asks for shots of knitting needles or crochet hooks with attention paid to depth of field.
My understanding (in a very basic sense of the word) of depth of field is having one part of the shot in focus and other parts out of focus. If the out of focus bits look good (like when they take on a honeycomb appearance) they may be called bokeh.. I think.

If one point of the shot is in focus and parts behind this point aren't then it's a short depth of field and if it's all in focus then it's a long depth of field. Not sure what it's called if a further point rather than a closer point is in focus ...
I think this might be a short depth of field too?

Crystal Palace dpns

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