EF 16-35mm f/4L IS USM w/ Free Red Line Active Backpack

This life-size converter is designed for exclusive use with the EF 50mm f/2.5 Compact Macro. It allows photography with magnification from 0.26x to life-size (1:1). The aperture drops one stop, but the auto focusing is very fast, making for easy shooting in close up situations where focus tends to be difficult.
(Exclusive for EF 50mm f/2.5 Compact Macro)