The Lensbaby Circular Fisheye for Nikon is a 5.8mm f/3.5 manual focus lens. The Lensbaby Circular Fisheye Lens has an aperture range of f/3.5 to f/22 and captures a 185˚ angle of view. A close focusing range (starts at 0.25" to infinity) adds an extensive depth of field. Focus distance scale and DOF scale on the lens aids in focusing. The wide 5.8mm focal length provides a fully circular image optimized for DX-format cameras. The Lensbaby Circular Fisheye is compatible with FX-format image sensors by producing a smaller image within the frame. The Lensbaby Circular Fisheye lens is not bendable; therefore, the fisheye is always perfectly centered in the frame. A polished internal barrel for reflection and creative flare fills the border around image circle with colors from bright light sources in the photo.