A 600 x 600 pixel crop of the moon using F2.8 IS lens and stacked 2.0x and 1.4x Canon teleconverters.
I accidentally took the picture in jpeg instead of RAW, and had to bring down the brightness,
so some of the features near the limb are blown out.

This image has been downsized to (600x600) pixels from a (1200x1200) pixel cropped original.