In designing this lens we successfully controlled the color aberration and distortion of picture image at the least, and could reach to the highest resolution power of 350-line/mm at center. Mounting threads is 58mm. Compatible with SONY VX-2000,DSR-PD150, Canon GL-1/2,XM-1/2 Front filter size is 72mm. Nominal 0.66X(Actual 0.66X/diagonal, 0.66X/center). Size/Weight : 75mm x 36mm 178g MTF 30%. Equivalent to 1890-line/TV(1/4" CCD),2520-line/TV(1/3" CCD). The picture becomes soft focus beyond 6X zoom telephoto position while wideangle lens is on the camera.