Sailwind Pro Soft Diffusion filters feature superior image quality - just enough to soften the edges. Great for executive portraiture, full-lengths, and wedding shots. Each successive grade of the Pro Soft filter offers you 50% more diffusion. Some threaded sizes available in grades 1 and 2.
This filter is glass and measures 75 x 75mm (3 x 3") x 2mm thick, and is available is grades 1 through 4, with 4 having the greatest effect.