for super slow motion:
shoot 60i w/ at least 1/120 shutter speed. (Faster works better)
Capture the footage normally.
Bring into after effects, set the timecode base to 24 in your project settings.
Set the frame rate to 24 in the comp settings.
In the interpret footage menu change it to 24 fps and then "separate fields" to "lower first"
Drop the clip in the comp, do a time stretch (layer menu) and enter 200%.
Add to the render queue and enjoy.
Here's an example:
https://www.newschoolers.com/web/content/videos/id/188983/member_id/82048/
If the above didn't make sense PM me and I can explain it more clearly.