The mathematics are quite straight forward.
If you are undersampling and your optics resolution is better than what you are recording then drizzling and many dithered images will get most of it back.
I have an FLI1803 behind my RH200 and even at native resolution of 9 micron pixels I am undersampling.
Here is a comparison of drizzled vs the original x2 binned. The drizzled image is very close to unbinned x1 image as far as star sizes etc but the faint nebular detail is far better.
https://www.flickr.com/photos/343863...n/photostream/
Hope this helps.