Clouds, damn clouds every night! So here's the no longer full moon during a break in the cloud cover. Canon T3i with an EF 75-300mm zoomed all the way to 300mm. I spot metered right on the moon and took the shot handheld! 1/640", f/11, ISO 800. This image is relatively sharper than the one I took at f/8.
What I'd do differently the next time around: Use a tripod and shoot at ISO 100 to reduce noise to a minimum. And perhaps try a couple of shots with smaller apertures to see how sharpness improves/suffers.