I have written a fair amount on macro photography over the years for a few reasons. Firstly, it's what got me into photography in the first place. Secondly, some early success with macro got me into commercial work and the latter is relevant here. I have been a watch guy since childhood and so naturally, once I bought my first camera, I wanted to learn how to photograph watches. I quickly realized it was difficult to get the shots I had in my head and part of the problem was the narrow depth of field that macro photography naturally has.
This is where I learned about macro stacking, and I met with numerous watch brands that had used advertising and product photographers before, but none of them were able to capture all of the intricacies of their dials or movements. So, macro stacking is my gateway into more paying jobs with watch brands and, thus, a lucrative technique to have learned.
In this video, David Bergman breaks down the limitations of macro photography, how macro stacking can overcome those limitations, and a visual example of the results, incidentally also with a watch.