Shortening the minimum focusing distance of Canon RF lenses, the Automatic Extension Tube Set from Viltrox also enables you to achieve a greater maximum magnification for close-up shooting with any lens. This kit contains 12 and 24mm tubes, which can be used independently or in combination for up to three different lengths to suit different subject types. Additionally, integrated copper-plated contacts maintain full autofocus and autoexposure functionality, and each ring features durable Canon RF front and rear mounts.