Upload & Sell: Off
I carry a set of ND (2,3,5 stop) and GND (2,3,5) 4x6 filters with a Lee mount. I have a set of step down rings to fit the mount to the four lenses that I normally use.
I also have a 77mm Nikon polarizer that is an essential part of my kit. If there's water, the filter normally gets used.
I have considered one of the variable ND filters, but they are awful expensive given that I already have a pretty good set of gear.