Close-Up Capabilities True macro design affords a life-size, 1:1 magnification ratio along with an 11" minimum focusing distance for working with close-up subjects. Focusing distance and magnification scale is printed on top of the lens to aid in more technical applications. Focus range limiter switch allows you constrain the usable focus range between 11-19.7", 19.7"-infinity, or full. This lens' focusing ring can be slid forwards and backwards to quickly shift between manual to autofocus modes. Internal focusing design maintains the overall lens length during use, benefitting focus accuracy and ease of use when working distance is a concern.