Thank you so much, I will check out the link and also keep my ISO lower (I didn't realize it might be a problem, having been told about how good the model is in low light situations). Ha ha I can't seem to help always pushing things to the limit.

I think I'll take the lens to the shop where purchased it and see if they can give a whirl. If they can come up with crystal clarity I'll know it's my eyes getting worse (I'm being serious -- I have adjusted the diopter several times so maybe it really is my vision).

Thank you so much to everyone here, I am very appreciative of such a generous and professional group.