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+--- Thread: interesting: cold to warm fader filter (/showthread.php?tid=747)
interesting: cold to warm fader filter - toni-a - 06-25-2016
didn't know it exists, a gradual filter (or whatever you wanna call it) but not gardual ND but gardual color temperature 2900 to 6300. the dark side it is equivalent to ND4 as light loss.
Anyone interested ?
http://stcoptics.com/en/products/icelava_warm-to-cold_fader/