one more from the last night NGC4945 and its only 13min and 50 seconds worth with the RASA and the ASI071. this was a frame and focus shot - a throw away image it was early in the evening - Astrofest 2019!!!
If you look at this wonderful table by Shiraz http://www.iceinspace.com.au/forum/a...e.php?a=217286
You can see that my gain was 80 so reference the 90 line , 30 seconds at f2 is equivalent to 6min at f7, so 13min would be 26 x 6, or 156min at f7 if I can extrapolate that? The sky meter reading there was over 22