[raymo]

Taken at 3,000mm focal length, and enlarged to somewhere around
a 20,000mm f/l image. The plainer image was just tweaked a little in PS,
and the more detailed image had the contrast increased a bit. I don't know whether the pattern is genuine, or a product of the increase in
contrast. I have never seen a high quality close up image of 3918
compare it with. 10 secs @ 1600.
Sorry about the huge size difference; I stuffed up.
raymo