"L'objectif zone plate donne à ces pâquerettes de printemps une auréole presque divine. The objective zone plate gives to these daisies of spring a halo almost divine."
"Nikon D3200, camera lens f/45 (http://stenocamera.fr/), ISO 200, speed 1/8 A "zone plate" or Fresnel zone, consists of a set of radially symmetric rings which alternate between opaque and transparent (see attached file). Light hitting the zone plate will diffract around the opaque zones."