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“4.5mm F2.8 EX DC CIRCULAR FISHEYE HSM For Sony and Pentax

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 sensor, it produces circular image within the frame. 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, Super Multi Layer Coating and inner focusing system provide superior image quality. HSM ensures fast and quiet auto focusing and includes full-time manual focus” source...