StepZoom for razor sharp.

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This image sequence, of a Pac3 interceptor playing tag with a Hera target missile, was taken with Questar's SZ180 telescope connected to a Cohu 8215 colour CCD camera. The equipment composes part of a suite of sensors mated to Raytheon's Sea Lite Beam Director (SLBD) located at the US Army's High Energy Laser Test Facility. Questar's motorised StepZoom 180 is an 8:1 variable focal length lens with what the company describes as the longest focal length available in an optic of its size. The system is fully motorised with microprocessor control, and the lens offers parfocal selection of...

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