67mm ND2-32 Filters Brass Frame Adjustable HD Ultra-Thin 36-Layer Anti-Reflection Green Film Nano-X PRO Series
SKU: KF01.1996
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There is a front thread to allow another filter to be mounted in front of the Black Soft filter, as long as the larger one is of the same aperture. For example, if the filter is 67mm, you would need to mount a 72mm filter.
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7.4mm