Here is a link to Cloudy Nights of lucky imaging in luminance of M51 doing 5 sec subs.
I quote
An ASI1600MM Pro CMOS camera was used for both image capture and guiding. The luminance image was computed using ~ 50 10 minute subs. Each sub was the average of up to 120 5 second exposures.
https://www.cloudynights.com/topic/6...y-imaging-m51/
Interesting he uses the one camera for imaging and guiding, however he did write his own guiding software (on a Mac) to do this..