When used with selected EF and EF-S lenses, this 12mm extension tube allows much closer focusing- great when trying to fill the frame with tiny subjects.BenefitsThis 12mm extension tube fits between camera body and the lens, providing a brighter image that the Extension Tube EF 25 IICompact and portable- a great accessory to take when shooting wildlifeMaintains electronic contact between lens and bodyContains no optical elementsWhen used with selected EF and EF-S lenses, this 12mm extension tube allows much closer focusing- great when trying to fill the frame with tiny subjects.BenefitsThis 12mm extension tube fits between camera body and the lens, providing a brighter image that the Extension Tube EF 25 IICompact and portable- a great accessory to take when shooting wildlifeMaintains electronic contact between lens and bodyContains no optical elements