It was around -30 with the wind-chill and stayed pretty warm until my auto focuser froze up, found that out after my fingertips froze trying to troubleshoot. I only had about an hour to get this shot before power lines and buildings were in the way so I focused manually and wrapped a few heater around the auto focuser in hopes it would warm up enough to use later. This is the first shot of three consecutive nighs pointed at the comet and this one was framed to get M29 and a few other open clusters.

Astro-Tech AT72EDII
0.8x reducer
ZWO ASI2600MC Pro
Skywatcher EQ6-R Pro
ASIAIR Pro
8 x 300 second exposures
Processed in Pixinsight and Photoshop