04-04-2016, 09:59 AM
I'm relieved you had also bad colour cast with HiTech filters. Given their marketing blurb, it should be very close to neutral, but in fact it's nearly psychedelic. I haven't seen a single colour in the picture which was as seen, when using as white balance "daylight" things improved a bit with a white balance preset and sky high Kelvin number.
The variable ND filters originally were made for fade-in and -out with film cameras to keep the aperture in place. Which means, on the screen you don't see worse colour cast than the lower light intensity already creates when the picture gets darker, or comes out of the darkness into normal light.
But we do the opposite, we keep a certain brightness which makes the slightest color cast extremely obvious. It all depends what we choose to photograph, but a purple sky without long morning or evening shadows remain surreal, contrary to a waterfall in the woods with already dim light. Here a little more purple or magenta can make a better color.
The variable ND filters originally were made for fade-in and -out with film cameras to keep the aperture in place. Which means, on the screen you don't see worse colour cast than the lower light intensity already creates when the picture gets darker, or comes out of the darkness into normal light.
But we do the opposite, we keep a certain brightness which makes the slightest color cast extremely obvious. It all depends what we choose to photograph, but a purple sky without long morning or evening shadows remain surreal, contrary to a waterfall in the woods with already dim light. Here a little more purple or magenta can make a better color.