The focal plane is also known as the section layer.
The focal plane is defined as the distance between your camera lens and the perfect point of focus in an image.
We can mark a section layer of a focal plane array of lenses or mirrors. The focal plane tells the viewer which elements are the most important in the image and which are not.
A well-chosen focal plane helps to create an image with impact, but a poorly chosen one can introduce confusion to the viewer's mind
The front focal point is located on the back side of a lens. This is a virtual focal point. We get the back focal point (or rear focal point), where the rays on the left side are parallel to the optical axis.
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