Metabones EF-E mount T Smart Adapter (Mark IV) w/ Support Foot for Canon EF/EF-S Lens to Sony E-Mount (MB_EF-E-BT4) Review

The Metabones EF-E mount T Smart Adapter Mark IV is a professional-grade lens adapter that allows Canon EF and EF-S lenses to function on Sony E-mount camera bodies. This fourth-generation model includes electronic communication between lens and camera, enabling autofocus, image stabilization, and aperture control. The included support foot adds stability when using heavier Canon lenses, distributing weight more evenly and reducing strain on the camera's lens mount.

At $161, this adapter sits in the middle of the lens adapter market, positioned as a high-quality option for Sony shooters who own or want access to Canon's extensive EF lens catalog. The "T" designation indicates this is the premium version with enhanced electronic features compared to basic mechanical adapters. The Smart Adapter technology aims to preserve as much lens functionality as possible when crossing between incompatible mount systems, though compatibility and performance can vary depending on the specific lens and camera body combination.