Gary,
Sure looks like you took your shot at the same stage of the eclipse as I did.
I see in my moon shots, not just tonight - all of them, exactly what you describe but I don't think it is a focus problem. I believe it's pixelation. A 300mm lens seems awfully big but that's still a very small part of the image. When cropped down it starts getting fuzzy.
Rusty
Sure looks like you took your shot at the same stage of the eclipse as I did.
I see in my moon shots, not just tonight - all of them, exactly what you describe but I don't think it is a focus problem. I believe it's pixelation. A 300mm lens seems awfully big but that's still a very small part of the image. When cropped down it starts getting fuzzy.
Rusty