Variable neutral density filters are typically more common for video than photography, but there’s that grey timelapse area in the middle where the two worlds tend to often collide. I usually go with regular NDs for long exposures and timelapse, but having recently picked up a variable ND for video, I have found myself using it a lot more for regular photography, too.
Mine doesn’t go quite as dark as Syrp’s new “Super Dark” variable ND filter, though. Offering 5-10 stops of neutral density, the filter will ship in both 62mm and 82mm sizes, with step-up rings to fit other lens sizes included. It also contains built in physical stops and handy markings around the edge of the filter to let you know just how many stops of light you’re blocking.