First astrophoto

I recently bought my first dslr camera - the Canon EOS T2i. It is easy to connect the camera to the telescope in prime focus using a T-ring adapter. The camera is controlled using Canon's EOS utility - which makes focusing much easier than trying to focus through the camera's screen (although still not foolproof).

This photo was 1/500 sec at ISO 200, f/6.3 (using a reducer/corrector attached to the telescope, which is usually f/10).

I tried to stack multiple shots using both Registax and Avistack - but encountered memory errors. It could be the PC or it could be the fact that the T2i produces huges files. I am clearly at the beginning of a very steep learning curve here!