Innovative filter delivering sharp images overlaid with soft unsharpness Features mini-lenslets on a plano-parallel glass disc for light scattering Enhances deep shadows and creates a shimmering aura in dark surroundings Ideal for professional portrait and landscape photography Reduces high contrasts and softens light fringes in backlighting Recommended for use with lenses of focal length 24mm or more with full frame, or 18mm with APS, and apertures larger than f/16