Chrome AF Mounting System - Maintains full Auto-Focus and Metering with Canon EOS DSLR's and EF/EF-S Mount Lenses Creates beautiful macro shots of insects, flowers, coins, jewelry and more Tubes can be used individually to shorten the minimum focus distance of your lens, or stacked for extreme close-up shots Compatible with Full-Frame & Cropped Sensors 1 Year Movo Warranty with Fast & Friendly Support