Here are first images of upcoming Panasonic L-mount tele converters: 1.4x and 2x. The official announcement will probably on May 31st, 2019 along with upcoming Panasonic S1S full frame mirrorless camera.
According to recently rumors, Panasonic will announce a new L-mount full frame mirrorless camera next week on May 31, 2019. This new L-mount full frame mirrorless camera is designed for cinematography.
dpreview has posted their CP+ interview with Panasonic. The main topic is about Panasonic’s full frame mirrorless cameras: S1 and S1R, and L-mount lenses: Panasonic S-line lenses, Leica L-mount lenses and Sigma L-mount lenses. You can see the full interview here.
Imaging-resource posted their interview with Sigma CEO at CP+ 2019. Sigma CEO said that there will be a lot of new L-mount lenses coming in 2019, including natively designed L-mount full frame mirrorless lenses. And Sigma CEO also said APS-C L-mount lenses will be coming in 2020.