When I use acronyms in an answer I generally try to spell it out the first time I use it and include the acronym in parenthesis. For the remainder of the answer I feel I am free to use the acronym since I have previously explained its meaning.
In your example, the first time I use the term it appears like this: depth of field (DoF). I've told the reader what DoF stands for. The reader should be able to understand what subsequent usage of DoF means.
There are a few acronyms that anyone discussing photography should understand. It should not be necessary to spell out Organisation internationale de normalisation (ISO) or International Organization for Standards/Standardization (ISO) the first time one uses ISO in an answer on a photography site. We should not need to inform the reader that the ISO organization has written many technical standards, technical reports, technical specifications, etc. and that each of these is assigned a number by the ISO or that the three standards that apply to the sensitivity of photographic film are ISO 6, ISO 2240, and ISO 5800.
When editing posts that use acronyms without explanation, I would suggest to follow the practice outlined above: spell it out the first time including both the acronym and the full name, then leave only the acronym at subsequent points in the answer.