1.25" Extension Tube for William Optics Binoviewer
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If you need more out-focus travel while using a William Optics binoviewer, this 1.25" Extension Tube for William Optics Binoviewers will provide you with about 1" of additional push-back. Precision machined from aluminum stock and black anodized. Threaded to accept 1.25" filters.
Manufacturer part number: E-BINO-EX
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