Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye Lens for Nikon Digital SLR cameras

• Produces a circular image with 180 degrees view in all directions
• Exclusively designed for Nikon digital SLRs with an APS-C size image sensor
• Fast, f/2.8 maximum aperture
• SLD glas ensures excellent optical performance
• High speed HSM autofocus
• Perfect for photographers using panoramic computer stitching software

Product Description The first Circular Fisheye Lens exclusively for use with APS-C size digital SLR cameras. This autofocus 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 digital SLRs with APS-C size image sensors, it produces circular image within the frame.The F2.8 large aperture value produces a bright image in the viewfinder and allows photographers to take pictures in low light conditions, making it an ideal lens for Astrophotography and Aurora photography. Due to the quantifiable angle/area relationship it produces, this lens can be used for scientific and arts applications such as solid angle measurements of cloud distribution over the sky or vegetation distribution of the forest.The minimum focusing distance of 13.5cm/5.3inch and maximum magnification of 1:6 make it particularly useful for close-up photography. SLD Special Low Dispersion glass provides effective compensation of chromatic aberration. Sigma's Super Multi-Layer Coating minimizes flare and ghosting. It is equipped with an inner focusing system that creates high definition and good image quality over the whole frame. The HSM Hyper Sonic Motor ensures fast and quiet autofocusing and allows full-time manual focus override by rotation of the focus ring. Box Contains Sigma 4.5mm F2.8 EX DC HSM Fitted Padded Case Lens Hood Front and Rear Caps Instruction Manual 1 Year Warranty Card