This life-size converter is designed for exclusive use with the EF50mm f/2.5 Compact Macro. It allows photography with magnifications from 0.26x to life-size (1:1). The aperture drops one step, but the autofocusing is very fast, making for easy shooting in close-up situations where focusing tends to be difficult.
NOTE: Exclusive for EF50mm f/2.5 Compact Macro.