I think I've got the f4 scope collimated pretty well now and have sorted out the TS KomaKorr to CCD distance with some thin T spacers. This is a slight crop as there was a meridian flip in the middle and the frames didn't quite match despite the target being centred as before the flip. I hope my processing might be improving a bit as well.
72x300s (6hrs) @iso1600
Image date, time and location: 23:19 - 05:49 27-10-2017 Manche, France
Telescope aperture and focal ratio: Teleskop Service TS1506UNC 6" f4, TS KomakorrF4
Camera and filters used: Canon1100D defiltered, Astronomik UV/IR Cut Clip Filter
Processing applied: Pixinsight BatchPreprocessing, PhotometricColorCalibration, Arcsinh Stretch, MSLinTrans, Gimp Levels, colour, noise and unsharp mask
(http://gallery.orpington-astronomy.org.uk/albums/userpics/10050/normal_M33_EOS_1100D_37x_ISO1600_300s_2017-10-27_Manche_France.jpg) (http://gallery.orpington-astronomy.org.uk/albums/userpics/10050/M33_EOS_1100D_37x_ISO1600_300s_2017-10-27_Manche_France.jpg)
Blimey 6hrs - that's dedication - looks really nice - well done Dunc. John
Nice to have that long to image, cool one,
Roger
That's really nice Duncan. Your images are starting to look more like CCD camera images. I guess it must be the new scope plus your improved processing skills.
Carole
That's the way to do it - 6 hours with an F4 scope!
It's come out very well indeed. Lots of colour, probably a bit too much for my taste but then again I suppose if you've got it, why not flaunt it!
Mark