Sirui 50mm F1.8 1.33x hands-on by Dpreview
Dpreview posted a first hands-on of this very exciting niche lens:
The a7R IV may not be the ideal Sony camera for shooting all types of video, but it does include an APS-C/Super 35 crop mode, which is where it produces its best quality 4K video. This cropping might be a bug bear for some videographers, but it makes the camera a good match for this lens. It’s possible to use crop mode with FHD resolution as well, but since the camera produces better FHD footage in full sensor mode, we’d recommend sticking with 4K.
However, to see the footage de-squeezed live it’s necessary to use an external monitor with that capability since the feature isn’t built into the camera.
Preorder at sirui.com/index/optical/anamorphiclens.html