hi Brettd, The best possible images of the moon are not usually taken
with a DSLR, owing to vibration from the mirror, and to a lesser extent,
vibration from the shutter. Your lunar image is very good, great job.
Try again with the mirror locked up[I'm assuming that it wasn't before].
You could try reducing your ISO to 800 and 400 with appropriate shutter speeds. The barlow might tend to soften the image very slightly,
depending on it's quality.
raymo
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