Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens for Sony Alpha Digital SLR Cameras

Fast F2.8 maximum aperture making it ideal for low light photographyMinimum focusing distance of 13.5cm and a maximum magnification of 1:6Equisolid angle projection method is possible for art and scientific useEquipped with HSM with full-time manual focus override
Product DescriptionThis auto focus circular fisheye lens has an angle of view of 180 degrees in all directions. It is exclusively designed for digital SLR cameras with the APS-C size image sensor. When used in conjunction with

Source: Digital Camera and Video Store...