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Lens Spacers, Shims, and Focal Length Extenders

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Lens Spacers, Shims, and Focal Length Extenders

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Applications can require a lens to stretch beyond its limits or be precisely dialed-in to its ideal design parameters. Lens spacers, shims, and focal length extenders are simple tools a user can easily use to achieve these requirements. These tools are used in between the lens and lens mount on the camera. Spacers and focal length extenders modify field of view (FOV) or working distance (WD) in fixed focal length lenses, whereas shims can be used to precisely control the WD of telecentric lenses.

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