The Metabones Canon EF to Fuji X T mount Speed Booster Ultra is a speedbooster adapter for mounting a Canon EF lens to a Fujifilm X mount camera. The adapter keeps all functionalities of your camera and your lens fully intact. You can still make use of image stabilization and easily configure and use the aperture. The Speed Booster has an incredible magnification factor of 0.71 for even better performance. Metabones also thought of the protection of your gear. The Metabones Speed Booster is equipped with dust and moisture resistant rings on the insde. Its black felt minimizes reflections.