I've managed to get around an hour so far on C/2020 F3 (NEOWISE) this
evening. I have kept with 10s exposures even though the comet is a lot
fainter than when I last imaged it on July 22. My animation is here:

http://www.nickdjames.com/Comets/2020/2020f3_20200728_ndj.gif

This consists of stacks of 20x10s (approx 320s total span including the
camera dead time) processed using an r=2, theta=10 deg Larson-Sekanina
filter. It shows the anti-clockwise rotation of the spiralling dust
quite nicely and complex flows in the tail.

Nick.