The lens is designed for exclusive use with SONY HDR-FX1 and HVR-Z1 High Vision Camera lens. Ithas an ultra wide field of view - 180 degrees (diagonal) and 138 degrees (horizontal). Further, the lens has an amazing resolution power of 625 lines/mm at center (MTF 30%) to suit the high vision image quality of the camera. Magnification: Nominal 0.24X, Actual 180 degrees (diagonal), 138 degrees (horizontal),Vertical 75 degrees (taken at 16:9 Wide mode) Lens Construction: 4-group/5-element, optical glass elements all surfaces fully coated. Mounting Thread: 72mm Measurement & Weight: 100 x 65, 700g Note: The lens is designed to perform an optimum capacity when used at the zoom range from the widest angle point to 3.3X ratio. Beyond the 3.3X toward telephoto, it starts losing the image quality at corners. | 
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