Extend the reach of your zoom without exposure loss. The Century 1.6X Tele-Converter is a clampon front-mounted accessory that also provides greater telephoto reach. Use it to instantly shift the focal length range of your camera in the telephoto direction. The perfect tool when it's inconvenient, dangerous or impossible to move as close to the subject as you'd like. Note that the Tele-Converter offers partial zooming, vignetting will occur at mid-range through full wide angle.