This is C11 made by Celestron, which is my first Schmidt-Cassegrain. It was coupled with Losmandy G11 can be seen in the picture (Left black tube). Now, it is operated with Vixen SXD since G11 was sold. I think G11 performed much better than SXD regarding handling C11. But, it doesn't mean that SXD can't be used for C11. As of now, C11 has been used for a visual observation. Well, I might be able to do astroimaging with a stock condition. But, it would be difficult to image deep sky objects with a long focal ratio (f/10). I would rather do astrophotography with Takahashi e180, f/2.8 or Vixen AX-103S, f/5.6 with x0.7 reducer.
