A slider is a device that allows you to attach a video camera and then move the camera side to side or backwards and forwards smoothly and precisely for interesting video effects, and can create a sense of movement where there isn’t any. Sliders come in many different forms and sizes, from small units no longer than a standard ruler and weighing a kilogram or so, to behemoths metres long and weighing tens of kilograms (in many respects you could consider a dolly a slider). Like tripods and gimbals, sliders are typically designed to suit specific camera weight ranges with some only capable of carrying a few hundred or so grams, to ones that can carry 100kg or more. Sliders also come in various operating configurations, manually operated or motorised, with the more sophisticated (read expensive) ones able to be operated via a mobile phone app or through built-in controls to provide all manner of sliding options. There are also sliders that can double their effective length through clever mechanics.