Request InfoSierra-Olympia Technologies Inc.The Vinden LR series of long-range thermal cameras from Sierra-Olympic Technologies Inc. feature powerful continuous-zoom optics. The OEM camera modules have several zoom lens options that provide a narrow horizontal field-of-view (HFOV) as small as 1.5° without compromising image quality, optical speed, or sensitivity. It also features a highly tuned, one-touch autofocus that is easy to use, with dependable operation throughout the zoom range. 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