For the 12-40mm lens we got those improvements:
- Stability of lens aperture when shooting videos has been improved.
- Enhanced stability of sequential shooting when using the E-M1 Mark II.
For the 14-42mm EZ lens:
- Stability of lens aperture when shooting videos has been improved.
- MF shooting operations have been improved.
Info via olympus.co.jp
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Thansk Dmitry!