I did not think it would be that good because of high thin clouds. This was just before the eclipse started. I used the Tamron 55BB 500mm f8 mirror with 01F 2x TC, good enough for normal moon shots. This was at ISO 400 and 1/30s, uncropped:
Later on it cleared, so conditions were pretty good. What I should have done was taken off the TC or increased ISO, because shutter time ended up too slow - the moon moved during the exposure. I was too cold to think. This is at 1.5 seconds, cropped:
I have some images that might work for stacking, but I've never done that.