I think I got a dud. aperture has two blades that do not constantly close smoothly or all the way.... f2.8 is good stuff, but I think after 20 clicks I think it is going to go for a ride if it doesn't break in real quick.

dang it.

Lens brand?

Yep, all the blades should open and close evenly and completely. I have not heard of that issue before. Give them a call over at CL for a recommendation.

bummer, mine practically lives on my D800...