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Variable ND –> NAB
Variable ND is an essential filter for serious DSLR video. Far as I am aware, there are only two manufacturers in the world: Singh-Ray and Light Craft Workshop. The biggest problem is these two small companies are swamped by DSLR demand and are perpetually out of stock. RECOMMENDATION: anybody at NAB should give Tiffen an earful – they are missing the boat. Variable ND was a novelty last year, but an essential today! For more information, see Philip Bloom’s comments.