During three nights in August I captured several series of the cirrus nebula first with O3- and Hα-, then with LRGB-filters.
After the first night all my Hα-images were trailed. There had to be a solution for this at last! After all I had a lot of well aligned and collimated high-end-gear at my disposal but the results still were disappointing.
Fustrated I searched for hours in the MaximDL-forum. There had to be others with the same guiding-issues! In the end I found a step-by-step instruction by Douglas George of Cyanogen and with its help guiding worked with sub-pixel-accuracy.
Before the test had the impression of a slight inaccuracy of the club's G41-field mount, but that proved as unfounded.
Autoguided photography with the club's instrument has the advantage of parallel observing throught the 13"-Newton. Just waiting while the laptop works flawlessly gets boring.
Because of the lack a reference-point on the OAZ for the camera's position the images are rotated with respect to each other.
In the third night I misinterpreted the filterwheel-position for the blue-filter, so I used the Johnson-I-Filter instead. Although I swapped this for the red channel the object in the end was already a bit low for the green-series, so this channel is comparatively noisy.
During two nights the venerable Canon 300Da with the kit-lens ran along piggyback and recorded the milkyway in Cygnus.