Fotodiox Pro Auto Macro Extension Tube, 21mm Section - for Canon EOS EF/EF-s Lenses for Extreme Close-up with Autofocus and Auto-Exposure

Product description

• Any combination of tubes can be used for various reproduction ratios
• No optical insert - maintains lens optical quality
• Maintains the electronic functions of the lens, including auto-focus and auto-exposure
• Three extension tube sections available: 13mm, 21mm, and 31mm