Currently, there are only a few CFexpress Type-A cards. These benchmarks are taken with an AJA system test with a Macbook Pro, using the Prograde CFx Type-A reader. The tests are run using 4GB files sizes with the Video Frame Size at 3840x2160 10-bit. The test is performed several times and the fastest results are chosen.
If you're buying the Z9 today, you'll want the 128GB Delkin Black CFexpress cards. They are currently the fastest card and should give you around 80 RAW lossless shots per burst. If you need a memory card larger than 128GB, the Prograde Cobalt or Wise Pro cards will be the fastest.
The Sony 50mm f1.8 is one of their cheapest lenses, meant to give shooters a taste of what it's like to shoot with a fast prime on a lighter budget with a very classic style of rendering. This lens has a cheap plastic construction and a clunky autofocus system but it is very small and very lightweight making it a great walk-around lens. There are a lot of technical issues but with the 6 element design, the lens produces some absolutely wonderful images with a more retro vibe.