Vancouver, Canada, June 24, 2019 - Two years ago, Metabones added support for Sony A9 with a maximum continuous autofocus (AF-C) frame rate of 10 fps by firmware to its EF-E Speed Booster and EF-E Smart Adapter lines of fully-electronic adapters. Today, the same feat is extended to A7 Mark III.
How to upgrade:
To achieve the highest possible AF-C frame rate on A7 Mark III, the adapter is set to "Advanced Mode". On the camera we recommend setting "Priority Set in AF-C" to "AF" for the best accuracy and the highest hit rate, even though that will decrease the frame rate. 10 fps is the theoretical maximum and just how close we get to that is highly dependent upon the AF speed of the lens used and the speed of subject movement.
The fastest frame rate is achieved when the subject is at or near the center where phase-detection autofocus (PDAF) is used. Unfortunately only the central PDAF points are effective, because using all of the PDAF points of the camera would have required metadata about the optical formula of the specific lens used, which we do not have. All the PDAF points can be used by setting the Speed Booster or Smart Adapter to "Green Mode", although the periphery points will still not be as effective as the central ones. Some older lenses may have reduced accuracy and/or speed in “Advanced Mode”, but they can still be used in "Green Mode" on A7 Mark III at a lower frame rate (3 fps). “Green Mode” is also faster at single autofocus (AF-S).
With Speed Boosters and Smart Adapters breaking down compatibility barriers, Metabones believes that the products themselves need to be continuously updated with new firmware to cope with new technologies, new cameras and new lenses. Patrons see value in Metabones products in the long term for compatibility with the broadest range of cameras and lenses and for the firmware updates. Leverage the 10 fps continuous autofocus feature of the best-selling full-frame mirrorless camera today using 32 years' worth of EF Mount lenses.