Producing an expansive 180° angle of view, the Pentax K-mount 15mm f/2.8 EX DG Diagonal Fisheye Lens from Sigma offers a super-wide perspective for creative applications. As a diagonal fisheye, this lens produces a notably distorted image that fills the entire frame, and its minimum focusing distance of 5.9" allows for working with unique perspectives with close-up subjects. Additionally, the bright f/2.8 maximum aperture benefits working in difficult and low-light conditions by allowing the use of faster shutter speeds.Wide 15mm f/2.8 diagonal fisheye lens is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides a 24mm equivalent focal length.Bright f/2.8 maximum aperture facilitates working in difficult lighting conditions.Expansive 180° angle of view pairs with the fisheye design to render imagery with distorted, curved lines. As a diagonal fisheye, the image fills the entire rectangular frame.Minimum focusing distance of 5.9" benefits working with close-up subjects and allows for producing highly exaggerated perspectives