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