Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens (Nikon Mount)Features: Take some of your most magnanimous shots and add drama to your images with the Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens (Nikon Mount). This lens, to be fitted with Nikon SLRs, creates a fisheye effect and has the typical convex non-rectilinear appearance. The image therefore captured is wider than what the human eye can see, and endowed with the unconventional curvature of field.With a minimum focusing distance of 5.3 inches, it paves the way for unique placement of subjects that can even be very close to the camera. The lens is capable of producing unique circular images and is particularly ideal for landscapes and panoramic photography. It is blessed with an equisolid angle projection system that makes it suitable for scientific applications as well.There is one SLD (Special Low Dispersion) glass element to correct chromatic aberrations and focus colours carefully at the film plane. Also on the offing is a Super Multi-Layer Coating that brings down flares and ghosting, and allows high contrast images throughout the entire zoom range.The result might just seem too good to be true but that is how it works. So get ready to flirt with the figments of imagination and come up with pictures that will make its way straight into the heart of the beholder!Lens Type Prime LensFocal length 5 mmImage stabilisation NoMaximum aperture F2.8Minimum aperture F22Maximum magnification1:6Minimum focus Distance13.5 cmLens Constructions (Elements / Groups)13/9Special elements / coatings SLD glassNumber of diaphragm blades6Focus method Internal, Auto FocusFilter Attachment SizeRear gelatin filterDimensions 76 x 77.
