Lens adapters let a lens and a camera body work together even when they were not built for each other: mount adapters that fit a lens with one mount type onto a camera body with another, and filter adapter rings that let a filter sized for one lens thread fit a different lens. Where a photographer's existing lenses do not natively match a new camera or filter, an adapter is the bridge.
Fit is exact on both ends - a mount adapter must match the lens mount on one side and the camera mount on the other, and a filter adapter must match both the lens's thread size and the filter's thread size precisely. Confirm whether an adapter preserves autofocus and image stabilization, since some mount adapters only support manual focus; this matters most for photographers relying on those features. For photographers standardizing on one camera system while keeping older lenses, adapters are often the more economical path than replacing an entire lens kit. COLAMCO supplies lens and filter adapters for the camera systems business, government, and education photo and video programs run.