The
EF 100 mm 2.8 Macro USM lens is a prime lens made by
Canon Inc. It is of the
EF lens mount that fits the
EOS camera system. There are three versions, the original, a second that adds a
USM autofocus motor, and a recently released L series version that incorporates
Image Stabilization (IS). It is a
macro lens, meaning that it is capable of reproducing an object the size of the image sensor, known as 1:1
magnification. Despite the macro designation, the lens can focus to
infinity like regular lenses. As such, it is appropriate for use as a
portrait lens. This lens can be used with an
extension tube, which increases the maximum magnification to 1.19× (EF 12 II) or 1.39× (EF 25 II). In these cases, focusing at infinity is sacrificed, with maximum distance reduced to 1002 mm (3.3 ft) and 606 mm (2.0 ft) respectively. ==EF 100 mm 2.8L Macro IS USM lens==