Zeiss will soon announced the Batis 40mm f/2 CF FE lens in next several days, just ahead of Photokina 2018. According to NC, the weight for this lens is 361g. The lens composition is 8 groups 9 pieces, the shortest shooting distance is 24 cm, the filter diameter is 67 mm, optical vibration reduction is not installed.
What can expect from Sony at Photokina 2018 ? Sony currently has no new camera codes registered, so we may not see any new Sony cameras (a7S III, a6700, a77 III, RX1R III) within next 1-2 months. But we may see some new FE lenses around this Photokina.