LiamK

The Sigma 70-200mm f/2.8 EX DG APO OS HSM (Canon mount) - Has anyone on here used this lens with a Panasonic GH4 + Metabones Speed Booster Ultra? The results of this combination with Sigma lenses like the 18-35mm and 50-100mm are very good. How about the 70-200mm though? I can't seem to find anything online about this specific setup. There's plenty of information and test footage of Canon's 70-200mm lenses on the GH4 but that's not what I'm after. I'm also wondering about the lens' autofocus compatibility with the Speed Booster. According to a compatibility chart on the Metabones website, Sigma's 18-35mm, 18-125mm and 24-105 have accurate autofocus while the Sigma 50mm f/1.4 EX HSM tested inaccurate.