Here is Janssen at f/20 with my 12 inch LX200GPS. I used a DMK 21F04 Firewire camera and Televue 2x barlow. I had to create a mosaic to see the entire crater at f/20 and unfortunately I did not do this fast enough as the light changed on me. I could not get a perfect match in the Mosaic. I have some practicing to do on my techniques.