Ideally auto align would be the bomb, but it's hit or miss on astrophotos; the scene is dark and stars are tiny. The situation is this, the camera is locked down but this damn planet rotates at just over 1000 MPH at the equator (I'm in Costa Rica, 9° north of the equator). In this case, my shutter is open for 4 seconds, then there's a 6 second break, then another shot at 4 seconds and so on up to 32 shots. You then want to align and stack those images and use the mean filter to eliminate noise (because you're shooting at a high ISO). Are ya with me? I've got a jpeg of my first and last frame blended, the rotation is obvious, but I can't seem to get it into this post.