Just as a by the way... I noticed mine were far from sharp this morning, even with it being much better (sharper) earlier.. the lower on the horizon, the more clouds/haze/heat warp/ etc also come into play.. Try shooting the moon on a clear night with it high in the sky and compare to this mornings run... I saw a significant loss in sharpness just from those factors, among other things, but at least I can be one of the thousands (hundred thousands? Millions?) that captured the event.