The 180mm f/4 VSF lens is a compact mid range telephoto lens. It yields a good camera to subject distance, slight flattening of portrait subjects, and exceptional sharpness.
The unique optical design essentially has an optically correct center, which can produce a sharp image virtually equal to a standard 180mm lens, when an aperture of f/8 or smaller is used. The edges of the lens elements are designed to induce spherical aberration, which creates a dreamy, soft focus effect when the lens is used at apertures wider than f/8. Unlike common soft focus attachments that simply degrade a sharp image, the RZ 180mm VSF can build a soft focus image using its unique combination of spherical aberration and diffusion disks. The result is tremendous creative control for effect from dramatic to subtle.