Hi guys, I have a question regarding aperture blade opening of a lens. Does the blade opening have to be perfect and even on all side or can it be uneven like the pictures here?
(my 18-70 3.5-4.5)
Opening at smallest aperture. You can see the uneven sides.
Mid-sized. One side is already a circle but the other side is still angular.
Widest. It's a nice circle.
I have another lens (50mm 1.8) and it looks perfect there. I'm just wondering whether I should bring it for service or just keep it for now, there's already some dust collecting inside it anyway. I don't think I see any effect on my pictures though.