Comment on the forum Metabones recently announced the long-awaited Canon EF mount Speed Booster Ultra for Fuji X, which will be one of the must-have accessories for X-T4 owners. This will have support for phase-detect AF and incorporates Caldwell Optics advanced 5-element ultra-high index tantalum optics. The Caldwell Optics focal reducer remains the best you can get. In this EOSHD Big Interview I caught up with Bo-Ming Tong in Canada,…