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FR-CV-75
The FR-CV-75 provides rotational adjustment for any of Newport’s Circular Linear Variable ND Filters having a Ø7.5 mm inner diameter. The slim design minimizes blockage of the filter's clear aperture and, with its clamping thumbscrew design, it can accommodate filter thicknesses from 2 to 13 mm. This mount is unique in that it has both English (8-32) and metric (M4) post mounting threads clearly marked on its base
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