This is 2h45 minutes (13x5minutes with a Nikon D750 at iso 400), (10x10 minutes with a Canon 6D at iso 400 using a IDAS LPS-D1 light pollution filter, and a further 6x10minutes from Dec 2015 with the same settings). There's still a ways to go with the image, as the core needs to be fixed, and the colour balance is a little off from the filter. There is also a diagonal cropping error on the lower right.