The Ektar colour during long exposure is pretty amazing. It's got a beautiful blue which is very saturated. I desaturated the blue in PP and got this colour. I didn't alter the colour of this shot.
These two guys stood still for about 10 min and I got 2 shots of them like this :-)
T: Mamiya C330s, 80 2.8 lens, F16, 2-3min exposure, Kodak Ektar 100 film (it was very low light and no filter was required)