Hi Roger,
another nice deep deep sky image. Congrats.
At a quick look with STAR Atlas-PRO the faintest objects are easily Magnitude 19 !
I marked one of them with an arrow in the attached image, the object is GSC2 S232231311602 at J. Mag. 19.03.
I've also attached a screen shot from STAR Atlas PRO that shows the area you imaged.
Your images remind me of those I did when I was using my Cookbook CCD on my 8" telescope.
Like these ones
NGC253
http://www.skylab.com.au/pmsa/NGC253_4.html
NGC4945
http://www.skylab.com.au/pmsa/ngc4945.html
NGC6744
http://www.skylab.com.au/pmsa/ngc6744.html
Cheers.
Paul M