Sony Released New Firmware Update To Reduce FE Lens Startup Speeds

Sony today released a new firmware update for select FE full-frame E-mount lenses including SEL35F28Z, SEL2470Z, SEL55F18Z, SEL70200G and SEL2870 to shorten start up time when mounted on α E-mount camera bodies.

The first update, available immediately, reduces the startup times of five existing FE lenses when mounted on E-mount bodies. See the list below.

On the other hand, new Sony 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.

Firmware updates to reduce Sony FE lens startup speeds


An additional software release for lens performance will be available in late March.

These lenses are:

  • 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

You can check the details at the Sony e-support site ( for more information. Update! to find the updates you have to search with the lens product name ex. SEL55F18Z.

via Sony