I shot the moon last night (11/13/16) close to the horizon, but was disappointed with the sharpness of the images. I used my 5DsR with 300 f/2.8 and 1.4xIII extender on a tripod, live view remote shutter, etc. The image below was shot at f/4 1/320 ISO 160, but tried other shutter speeds and apertures with roughly the same results. The lack of sharpness may have been due to atmospheric haze since it was fairly close to the horizon.
I plan to shoot it again tonight in a better setting (hopefully reflecting off a pond if the wind is still and sky clear). Can others share their camera settings that have worked well in the past?