thanks all - very kind of you to look in and comment.
Akira, yes, it is cropped. The original NEF file was 4928x3280. The Tiff final copy of this image was reduced to 2803x1827 (about 30%). The posted copy was reduced to 1200 pixels on the long side and prepared as a Jpeg for posting.
PS - about moon images as such, Mongo noticed that the best images he has managed have all been in the late afternoon and then processed accordingly. Others taken at full moon at night etc, have generally not turned out as well - usually too bright or lacking detail because of the nature of the light and its angle. In theory, the best light for this should be in a dark sky when the light is hitting the moon at about 30 to 60 degree angle. Mongo has yet to test his theory but tends to like sleeping at those hours of the night instead.