Hi there! My first post here!

Sorry to reopen an old thread, but I believe it could be of interest... It is true that this camera doesn't have the option to select RAW + small size jpg for previews (the only choice is RAW + biggest jpg size), but it is also true that with my equipment it is working pretty well by changing some default settings within ControlMyCamera 1.0.3. Here goes my equipment:

- Canon EOS 200D (latest firmware 1.0.3);
- LRT Pro Timer 2.5 (latest firmware 22);
- iPhone Xr (latest iOS version);
- Latest ControlMyCamera's TestFlight build.

I mainly shoot sunsets via Auto Holy Grail within ControlMyCamera, which works flawlessly. I've used 3-way ramping in a smooth way, everything within the ISO & aperture ranges and reaching a maximum exposure length of 4" (my equipment's dark time is below 1,8" and this allows me to set a maximum exposure time of 4" and an interval of 6").

Regarding the transmission of the big jpg previews, I use a 4G Huawei router to connect all the equipment via Wi-Fi, and then it was necessary for me to increase the pool size and the previews transmission's interval (all these settings are within ControlMyCamera). By changing these settings, the previews are sent less frequently, so the app has enough time to receive & analyze the preview from the camera in order to change the exposure parameters accordingly.

So here go my two cents on this camera and topic! Hope it helps!

Keep safe & cheers from Spain!