Do they affect the picture quality? I would guess they would not, and you would be at much greater risk taking the lens apart for introducing more dust or misaligning the element.

For a good test on how eh.... "small" imperfections affect image quality, see here:

http://www.lensrentals.com/blog/2008...ment-scratches

And here:

http://www.lensrentals.com/blog/2011...e-of-lens-dust

It takes a pretty big "flaw" in a lens to show up on an image

Enjoy the lens I always wanted to play with one of those!