Sony is releasing a pair of firmware updates this month that will reduce startup times when FE lenses are attached to both full-frame and APS-C bodies.
The first update, available immediately, reduces the startup times of five existing FE lenses when mounted on E-mount bodies. The lenses include:
FE 35mm F2.8 ZA Carl Zeiss Sonnar T*
FE 55mm F1.8 ZA Carl Zeiss Sonnar T*
FE 24-70mm F4 ZA OSS Carl Zeiss Vario Tessar T*
FE 70-200mm F4 G OSS
FE 28-70mm F3.5-5.6 OSS
Firmware update number two ensures that the three prime and one zoom FE lenses introduced today will offer fast startup times on Sony's full-frame a7 series cameras (in all other respects they are already fully compatible). This update will be available at the end of the month.