I used video to capture this image, if I recall this was about 24 frames per second with a total of about 1500 frames, after processing I was left with left about 600 frames for the final image. Center of image is Mare Crisium, is the result from a large meteor impact about 3.9 billion years ago. The smooth floor is about 400 miles in diameter. Lava flow features are clearly evident on the floor of the mare.
Interesting note, Russia's Luna 15 spacecraft crash-landed in Mare Crisium in 1969.