This is an 9-panel mosaic of the last quarter moon. The seeing was excellent at the beginning and it deteriorates a bit towards the end. My C11 also has some field curvature and collimation imperfection. But I think the end result looks quite good. I also added a Mars image from the same night (~8hours earlier) for comparison of their visual sizes.
See a much larger version of this photo on my Astrobin page.
Or click here for a full resolution (about 300 meters per pixel) version (make sure to zoom in!).