

During the a6400 press event a few weeks ago, Sony had several slides showing the advantages of their mirrorless E-mount. Some of the slides were directly targeted at Leica since Stephan Schulz from Leica Camera AG claimed that the Sony E-mount was not designed for full-frame mirrorless cameras (there are several other articles online making the same claim).

Sony first tries to compare E-mount with F-mount in order to show that an f/1.0 lens for Sony E-mount is possible:



but in the last slide, Sony shows that the Nikon's mirrorless Z-mount is capable of handling f/0.58 lenses:

Leica L-mount: f/0.63

Sony E-mount: f/0.63

Canon RF-mount: f/0.62

Nikon Z-mount: f/0.58

Here is the screenshot:



This is news to me since previous reports/interviews indicated that Nikon's optical engineers have calculated Z-mount can accept lenses up to f/0.65.

Here is the video from the presentation (watch from the 8:10 mark):

Via PhotoRumors