Often we see photos of people holding the tip of Eiffel Tower or leaning against the Leaning Tower of Pisa or even gobbling up the sun. That is what forced perspective is all about. We use the camera settings in such a way that the difference between the foreground and the background is intentionally blurred.
Now look at the photo below.
You notice that all the objects are in different planes, yet in the first photo they seem to be kept side by side. That is the beauty of forced perspective.
Situation: My usable DOF is less than what is needed to cover my entire subject. Increasing the DOF will rob the dreamy effect and I don’t want that. What to do?
Solution: Use focus stacking.
We shoot a series of photos with focusing on the nearest point of focus of the subject and keep shooting till we reach the end of it, changing the focus, bit by bit every time. Then, we combine them and have a composite photo, where the subject is sharp. The background doesn’t change because we don’t change any camera settings here.