【One adapter, so many options】Compatible with Exakta (Not compatible with Topcon) lens, Compatible with Canon EOS EF mount cameras. Using the PHOLSY adapter, you can mount the EXA-lens on your digital EOS EF-camera instead of the EF-lens | 【No loss of image quality or speed】Infinity focus allowed. When using the PHOLSY-adapter, no mechanical or electrical functions, signals or data are transferred between EOS EF system cameras and lenses. So have to manually adjust all settings (no autofocus) | 【New exterior design, solid & durable】Built from aviation grade aluminum and copper, the MOUNT ADAPTER is strong and lightweight with a durable finish, really very resistant and performing for vintage lenses | 【Precisely matched】The lens mount adapter compatible with Canon EOS EF mount camera is well constructed and makes a tight fitting connection to the lens and camera body, to preserve the performance of pro-level cameras and lenses. And it makes a precise fit with the camera and lens, crucial for meticulous performance. Attaches and detaches to the camera body smoothly and cleanly. No light leakage. Keep using the lenses you love with the most innovative camera bodies available | 【Clever design】Easy to mount and dismount. Travel lighter, use one set of lenses with two camera bodies. Best of new and old, use vintage lenses with your digital camera.【Note】You must set in the camera menu to "shoot with no lens attached"