The eclipse thing was a total curve ball for me. I stumbled outside at about 4 AM, forgot my glasses, cranked up the ISO all the way (3200), open the lens up all the way (5.6 with the 1.4 extender - 910mm total) and still had to shoot at less than 1/15 (slower and the moon blurs because it's moving). All of that and I really couldn't tell if the focus was right or not. Finding the edge of the moon with autofocus provided enough contrast to trigger the system. The eclipse was overall a lot darker than I thought it would be - plus it goes on for hours and hours. I would love to see other folks' pictures of the eclipse if there are any.