I picked up a little 90mm Graphex yesterday with nice clean glass and a shutter that works well, but it has a teardrop shaped aperture.
There is a pin on the back of one blade that seems to be missing, so it doesn't close all the way down like the rest of them.

I was wondering if, and how this will effect the quality of my images? I should mention that I almost always use these lenses closed down to f/22 or 32.


Thanks,
Adam