Tiffin PV variable ND

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This fantastic high quality variable ND fits into the tray of your matte box and allows you to maintain your desired lens stop and ISO by having the perfect amount of ND at all times, and when using cameras with insufficient amounts of ND it supplies the extra required. It also has the added function that if you reverse the clip in filter you can rotate it to either warm up or cool down your white balance. This product has been a long time coming.