Sony is scheduled to announce new 400mm GM and 600mm GM lenses on 15 September, with EU prices reportedly set at approximately €3,000 and €4,200, respectively. The announcement is expected to take place at around 1 p.m. Japan time on the same day.
Sony is reportedly scheduled to announce the new FE 400mm f/4.5 GM OSS and FE 600mm f/6.3 GM OSS lenses between 3 and 4 p.m. on 15 September, London time. The announcement is expected to take place at around 1 p.m. Japan time on the same day.
The estimated EU-market prices are approximately €3,000 for the 400mm and €4,200 for the 600mm. Based on the exchange rate at the time of writing, these are expected to equate to approximately ¥530,000 and ¥750,000, respectively.
Based on information from SonyAlphaRumors, the article describes the announcement as highly credible and reports that the lenses are almost certain to be launched even though no photos of the actual products have been leaked. It also reports that the lenses may be smaller and lighter.