Lowest officially supported Framerate on any Resolution is 60fps.
It DOES allow you to go way lower than that, but it gets really unstable, and unreliable, also Image Quality gets very bad at anything lower than 30 or 20 fps usually, and Black-Calibration stops working at certain settings, or just wont work at all for really low Framerates. Lowest Framerate i been able to capture anything worth showing to anyone with was 5fps on the Chronos 2.1, but that shot had to be HEAVILY edited to look like that (not really useful in Real Life, but i like to know and Test the Hard and Soft Limits of my Gear anyways, even if it gets a bit Ridiculous at times; Especially with a Camera that lets you set just whatever Framerate you want basically. Software Limits you to 1.00fps as a minimum, if i recall correctly though, but it gets basically unusable way before you would even get that far, so that is a fair Limit. As Said Earlier, officially supported is anything at 60 or more Frames A Second up to the Maximum Framerate Limit, the Camera Sets According to your Set Resolution.).
See:
https://forum.krontech.ca/index.php?topic=597.0 for that.
Anything between 1000fps and like 240fps (which quite a bunch of Mainstream Cameras can shoot in HD or better these Days) is however very usable, and good to have for things, that just look too slow or boring in full 1kfps or more; or where Light is limited, it can allow you to increase the Exposure time per Frame just enough to still get a very high Quality Image.
