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A remotely operated 8 inch aperture telescope for long distance surveillance. It is a step zoom system with 6 discreet focal lengths (all parfocal) yielding focal lengths of 450 mm f/2.25, 760 mm f/3.8, 1290 mm f/6.45, 2200 mm f/11, 3100 mm f/15.5 and 4000 mm f/20. System utilizes RS 422 serial communications and is ideal for applications requiring multible pre-set modes.