Basically, variable NDs are more fast and practical, with a bit lower quality, and more uneven tint. And the problem with the fixed ones is that, for example, you have one filter which reduces 6 stops, but you need to reduce 7 stops. So you have to put a 1 stop ND filter on top (which could affect definition or color), or sacrifice one variable that you wouldn’t like to change (aperture, shutter speed or ISO). 1- I would like to read experiences from people who use fixed NDs. How do you adjust the entrance of light if one filter alone doesn’t give the proper exposure? If there aren’t fast movements, would you increase the shutter speed? Because you won’t notice the difference and you don’t want to increase the depth of field closing the aperture. 2- I learnt that variables, because of the polarization effect, could flat skin tones, as if they had too much make-up, because of the reduction of reflections. Have you noticed this effect? This video shows a technique to optimize the VND to have better colors and to reduce skin flatness: What do you think? Have you practiced this technique? 3- Let’s say you need continuity between shots in a scene. But at the same time you could be using the sunlight, which might change a bit and so as a consequence you may rotate the VND ring to adjust the exposure. I guess this adjustment could modulate color a bit, which is not desirable in contiguous shots in a scene, like in a shot reverse shot sequence. So, in this scenario, would it be advisable to leave the VND untouched? (if that is possible, because I guess you could move the ring accidentally).