First bit of news – the highly anticipated Sigma 50mm F1.4 DG HSM ART now has a price. Lower than expected at $995. Early reviews say this lens is close to the $3.5k Zeiss Otus in performance terms. This will be an exceptional piece of glass to use on the GH4 with Speed Booster. Pre-order the Nikon mount version at B&H for $995 if you plan to use Speed Booster. The Canon mount version is also…