A C-stand, short for Century stand, is a heavy-duty support stand used in photo and film studios to hold lights, flags, reflectors, diffusion frames, backgrounds, and props. The defining feature is its sliding-leg base: the three legs telescope and rotate, allowing the stand to plant flat against walls, straddle other equipment, or position itself low to the ground. Combined with a turtle base option, a grip head, and an extension arm (often called a gobo arm), the C-stand is the most versatile stand in a working studio and a piece of equipment professionals tend to buy by the half-dozen rather than the pair.
The standard configuration is a 40-inch column with three risers, extending to about 10.5 feet at full height. The base legs slide independently so one can be tucked under a table, another extended across the floor, and a third stepped on by an assistant for stability. The column is 1-1/8 inch in diameter, the industry standard that matches grip heads, baby pin receivers, and most professional lighting hardware. The whole rig is built from steel, weighs 20 to 25 pounds empty, and is designed to support 20 pounds or more of horizontally-extended payload without tipping.
The grip head and arm transform the stand from a vertical post into a positioning tool. The grip head clamps to the column or to the arm and accepts a second rod or accessory at 90 degrees, allowing offset positioning of flags, reflectors, or small lights. Two grip heads stacked produce nearly infinite articulation. The arm itself, typically 40 inches long, lets you boom a modifier or light modifier over a subject without a stand leg intruding into the frame, which is critical for top-down product, food, and tabletop work.
Loading rules matter. The arm should always extend over the highest leg of the base, never over the shortest leg or between legs, because the offset weight will tip the stand. The knuckles on the grip head should be tightened in the direction the load wants to fall, so gravity tightens rather than loosens the lock (the right-hand-thread rule: tighten clockwise so a falling load self-tightens). A sandbag or steel weight hung off the highest leg adds counterbalance for boom arm work. Most studios use 15- to 25-pound sandbags as standard ballast on every C-stand carrying weight overhead.
The brand and grade variance is significant. American-made Matthews and Avenger stands are the studio standard, with steel that resists deformation under repeated road use. Kupo, Impact, and other Chinese-manufactured options have closed much of the quality gap at a third the price. Cheap imports often fail at the grip head, where soft metal threads strip after a year of clamping force, or at the rivets in the sliding-leg base. For freelancers, used Matthews stands hold value indefinitely and are often the best buy on the used market.
The C-stand is overkill for casual on-location work with a single speedlight, where a lightweight folding stand is faster and lighter. It comes into its own when an assistant is positioning a 4×4 floppy, a flag, or a heavy strobe with a 36-inch softbox, and the wind or accidental bump that would topple a lighter stand is not an option. In rental houses, C-stands are quoted by the day and are usually the first item on a grip package list.