The GF1 also provides a total of 16 Scene modes, including a new Peripheral Defocus mode that keeps the subject in sharp focus while gently softening the focus around it.

It can be used to optimize the all optical switch design for different materials (self focus and defocus), nonlinear indices and wavelengths.

FMF evaluates the defocus degree of interesting region image. Focus measurement is a kind of reference image quality evaluation.