I recently shot a wedding where I had to use my EF Extender, and I double-triple checked my focus multiple times throughout the ceremony and for some reason it is horribly blurry. I was using the built in ND's, and the extender.
I've attached a picture where it shows how it's very blurry, and it's not out of focus blur, it almost makes my eyes hurt looking at this still as the blur is just so odd.
Any ideas? Thank you.

I've attached a picture where it shows how it's very blurry, and it's not out of focus blur, it almost makes my eyes hurt looking at this still as the blur is just so odd.
Any ideas? Thank you.

