![f051-01](https://article-imgs.scribdassets.com/8k398qxo1sad0sxr/images/fileCAP70KW5.jpg)
My last article was about selecting a lens based on the criterion of background blur. Following that, I’ve been asked to write something on choosing aperture, focal length and shooting position to achieve the desired background blur. Of course for many such things, practice and experience is the key, but some like a theoretical approach.
First, consider the diagram below. This is a copy of the one in the