Fotodiox Pro Auto Macro Extension Tube, 21mm Section - for Canon EOS EF/EF-s Lenses for Extreme Close-up with Autofocus and Auto-Exposure Film Cameras most of Bluetooth devices could

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Fotodiox Pro Auto Macro Extension Tube, 21mm Section - for Canon EOS EF/EF-s Lenses for Extreme Close-up with Autofocus and Auto-Exposure Film Cameras most of Bluetooth devices couldA macro extension tube is a wonderful substitution for the expensive macro lens. The lens transforms into a macro lens while maintaining its optical quality. By placing distance between your camera body and lens, focusing distance is shortened and the effect of magnifying your subject is created. Fotodiox Pro Auto Macro Extension Tube for Canon EOS is an automatic tube that is able to communicate all electronic functions from the lens to camera