Very impressive captures. The comet sure looks much fainter than Mag 15 as predicted. It looks like a 5 min exposure would have likely missed it. What kind of system was Mr. Borisov using that he found it almost 2 weeks ago? It least it was a new moon then, but still wow!
Thanks for the article at Skyhound.com, very interesting.
Borisov's camera looks to be optically 'fast'. Do you know what optical design it uses? It doesn't have the corrector plate of a Schmidt-type system. It's really impressive that he found this comet at ~mag=19.
All I know about Borisov and his telescope is what little I could gleam from a video in Russian with an often hilarious auto-generated English translation!