Quote Originally Posted by Shaggy
If you have a blade that actually "hops" over another one I believe the lens may have been serviced by a camera barbarian. The orientatiion of the top blade is correct, but unless the other blade is the bottom blade I believe it has either been incorrectly assembled, or when a lens group has been removed something got in there & bent it.
Does it look like the bottom blade is actually causing a wear pattern on the blade beneath it? That would be a good indicator of something being wrong.
That's precicely what it looks like, and the one with the tip down certainly isn't the bottom one. But it seems to work although it feels wierd to buy such a lens.