It's not that it wouldn't be possible, I just don't think it has been done as there are much cheaper and simpler options. One problems would be the slow download speed of each frame to your computer, even if using small normal settings. It would be good if you could have a ROI to select, that would speed up the downloads. I don't think there are any autoguiding programs that would work using a DSLR, though K3 can control the camera it wouldn't autoguide off it.
And that is just off the top of my non-techi head.
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