"I really like the HocusFocus routine"
Bret Lanius, Camera Assistant, Atlanta

The depth of field is not enough to cover the actor walking from A to B. So, from where to where do you pull?

The DP wants the background to be as soft as possible. Where do you set your focus to?

The shot calls for a deep focus. Which stop do you need to get everything in focus?

Yes, can help. Enter the f-stop, lens, distance of the nearest object that has to be in focus and distance of the furthest object that has to be in focus.

A smiling Mart lets you know that the dof is indeed sufficient, and no focus pull will be needed (at least not for technical reasons).

The first line (10'8) will give you a focus setting that will give you maximum depth of field in the foreground, while keeping the further object just in focus.
The third line (17'2) will keep the closest object just sharp, while giving maximum sharpness in the distance.
The highlighted middle line (12'10) gives a well-balanced setting between the two extremes. This is the recommended setting when focus is not a creative issue.

But what if the dof does not cover the whole distance? Here helps you determining the minimum pull needed to cover the range. In our example a pull from 12'10 to 20' would ensure that the actor moving from 12'6 to 20'9 would stay sharp throughout.

You might come into a situation where two objects need to be sharp without a focus pull. In that case can calculate the minimum needed f-stop necessary to achive this (in this example you would need an f-stop of 11 1/2, or almost 2 extra stops).

How to calculate a focus split. Split focus can be calculated easier and quicker with Camerad