Hi Stu, the video is of frames aligned in Registax, so it looks rock solid. I'll post up a video of the actual capture. The 600D has a 1920x1080 crop mode whereas the 550D has a 640x480 crop mode. I have used both but needed continual monitoring and input of the Goto tracking. In the end I just stopped aligning the scope and tracked manually. Practice does improve things so don't give up. 5x on a 550D crop is quite a challenge. I first started with 2x, then 4x then 5x then used the 600D to get to this 10x image - although it is now pushing the limit of the system in terms of ISO. Hope that helps!