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| Garrett Optical’s Center Post Extension adds 1” of height to the Gemini 25x100 and 30x100 center post to allow the binocular to reach its minimum IPD setting with the Series 5000 and Bogen 501 tripod heads. Made of precision-machined aluminum, this 1.5" diameter round extension has 1/4-20 x 3/8" male stud on top and 1/4-20 threaded hole in the bottom.
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