Do you need to take RAW/DNG images at 2 frames a second? Or, can you use the Z1 JPEG, which is a nice, high resolution?
Does your application allow you to take video (which will be at lower resolution) and then extract the frames as images? This is what most companies are doing.
If you search on this forum for 5.4K video for THETA V, you will see that Google somehow is extracting full-resolution images from special video using their Streetview App. Although this capability is not open to us normal developers, you can try and use the 4K video to extract the frames.
Street View 5.4K video and EV Setting
I haven’t looked at the code in a while, but I remember that there was some lower limit for the framerate. You can try and modify the Z1 plug-in code and reduce the framerate until it fails.
Can you provide more information on what your application does?
Is it for timelapse or to to capture changes to a physical space such as a construction site over time?