Full Moon

It was a full moon a few nights ago. I grabbed my tripod and my 55-250 IS and attempted to photograph it. Its not as clear as I had hoped it would be. Also I can see the limitation of the Rebel XT with 8 megapixels and only 250mm reach, the photo here is a 100% crop, no resizing, so I end up with only 720x720 photo. Definitely too small for any kind of print. I think with a longer reach lens, or more image size I would be able to get a larger photo and probably more clear.

The settings on the camera were:
ISO 100
Focal length 250mm
f/10
1/200 shutter